PART X.--INFANTS’ AND INVALIDS’ FOODS 497-500

Modified Milk, 497; Solid Infants’ Food, 498; Invalids’ Food, 498-499; Composition Infants’ and Invalids’ Foods, 500.

APPENDICES.

APPENDIX A 501-521

Food Standards, 501-517; Law Relating to Filled Cheese, 517-521.

APPENDIX B 522-537

Rules and Regulations for the Enforcement of the Food and Drugs Act, 522-533. The Food and Drugs Act of June 30, 1906, 533-537.

APPENDIX C 538-561

Regulations Governing the Meat Inspection of the United States Department of Agriculture, 538-556; Meat Inspection Law, 556-561.

APPENDIX D 562-615

Food Inspection Decisions under the Food and Drugs Act, 562-615. Food Inspections Decisions under the Imported Foods Act F. I. D.’s 1-39, 562-584. Food and Drugs Inspections and Decisions under the Food and Drugs Act F. I. D.’s 40-64, 584-615.

INDEX, 616-625

LIST OF ILLUSTRATIONS.

COLORED PLATES. PAGE. 1. Beef Tenderloin, _Facing_ 15 2. Beef Sirloin, „ 15 3. Beef Ribs--Regular Cut, „ 15 4. Beef Ribs--Spencer Cut, „ 15 5. Sirloin Butts, „ 15 6. Beef Rib, „ 15 7. Beef Loin, „ 15 8. Drying Figs: Smyrna, Smyrna Section, Adriatic, Adriatic Section, „ 349 9. Olives: Mission, Sevillano, „ 402 10. Jordan Almond, „ 414 11. Peanut (Arachide), „ 420

FIG. 1. Cuts of Beef, 16 2. Commercial Cuts of Beef, 17 3. Diagram of Cuts of Veal, 18 4. Diagram of Cuts of Lamb and Mutton, 19 5. Diagram of Cuts of Pork, 19 6. Commercial Cuts of Pork, 20 7. Graphic Chart Representing the Comparative Influences of Foods and Preservatives, 39 8. Lard Crystals, 67 9. Beef Fat Crystals, 67 10. Kettle for Rendering Lard, 72 11. Apparatus for Test of Adulteration of Lard, 74 12. Chicken House, Rhode Island Experiment Station, 96 13. Cow Stables, Mapletown Farm, Sumner, Washington, 170 14. Apparatus for Cooling Milk, 172 15. Improvised Wisconsin Curd Test, 177 16. Milk; Broken Curd in Whey; Matted Curd, 177 17. Curd from a Good Milk, 178 18. Curd from a Tainted Milk, 178 19. Curd from Foul Milk, 178 20. Power Churn, Ready for Use, 183 21. Power Churn, Open, 184 22. Barley Starch, 218 23. Buckwheat Starch, 222 24. Section of Raw Popcorn, 224 25. Section of Popcorn in First Stage of Popping, Showing Partially Expanded Starch Grains and Ruptured Cell Walls, 225 26. Section of Fully Popped Popcorn, 226 27. Indian Corn Starch, 229 28. Starch Grains of Indian Corn, under Polarized Light, 230 29. Oat Starch, 235 30. Rice Starch, 237 31. Rye Starch, 238 32. Wheat Starch, 242 33. Wheat Starch under Polarized Light, 243 34. Kedzie’s Farinometer Showing the Parts, 246 35. Kedzie’s Farinometer in Use, 247 36. Comparative Appearance of Breads of Different Kinds, 259 37. A Field of Durum Wheat, 261 38. Drought-resistant Macaroni Wheats (Heads and Grains), 262 39. Potato Starch, 291 40. Potato Starch under Polarized Light, 291 41. Rasping Cylinder for Making Starch, 297 42. Shaking Table for Separating the Starch from the Pulped Potato, 297 43. The Potato Rasping Cylinder Arranged for Work, 298 44. View of Indian Corn Canning Factory, Showing Accumulation of Husks and Cobs, 308 45. Maranta (Arrowroot) Starch, 318 46. A Cassava Field in Georgia, 319 47. Cassava Starch, 321 48. Scuppernong Grape Vine, Roanoke Island, 338 49. Vineyard Near Fresno, California, 339 50. Avocado Tree, 346 51. Fig Tree Thirty Feet High Near Yuba, California, 350 52. Jamaica Mango Tree, 356 53. An Edge of a California Orange Grove, 358 54. The Original Seedless Orange Tree, 359 55. A Group of the Washington Navel Orange on the Tree, 360 56. Covered Pineapple, 361 57. Removing the Oil Cakes from a Cottonseed Press, 400 58. Pecan Tree, 30 Years Old, Morgan City, La., 422 59. Five Forms of Choice, Thin-shelled Pecans. Also Wild Nut Showing Difference in Size, 423 60. Full Grown Pecan Tree, 425 61. Common Mushroom, _Agaricus campestris_, 440 62. Edible Mushrooms (_Agaricus arvensis_ Schaeff.), 441 63. Shaggy Mushroom, _Coprinus comatus_, 442 64. Fairy Ring Formed by _Marasmius oreades_, an Edible Mushroom, 444 65. Puff-ball, _Lycoperdon cyathiforme_, Top View, 445 66. Amanita (Full Grown), 446 67. Fly Amanita Buttons (_Amanita muscaria_), 447 68. Correct Position of a Mature Beet in the Soil, 458 69. Map Showing Temperature Zone in Which the Sugar Beet Attains Its Greatest Perfection, 459 70. A Field of Beets Ready for Harvesting, 460 71. Beets Ready for Transportation to Factory, 461 72. Diffusion Battery, 462 73. Multiple-effect Evaporating Apparatus, 463 74. Vacuum Strike Pan, 464 75. Sugar Cane Field Ready for Harvest, 465 76. Cane Field Partly Harvested, 466 77. Tapping the Maple Trees, 468 78. Transporting the Sap to the Sugar House, 468 70. Boiling the Maple Sap, 469 80. Small Primitive Mill for Extracting Juice from Sugar Cane for Sirup Making, 473 81. Mill and Evaporating Apparatus for Sirup Making in Georgia, 474 82. Relative Length of Canes Used for Sirup Making, 475 83. Swarm of Bees on Bough of Tree, 487 84. Artificial Bee Hives under Shade of Grape Vine, 488 85. A Frame Containing 24 Boxes of Honey, 489 86. Showing Box of Honey Partially Capped, 490

INTRODUCTION.

The growing importance to manufacturers, dealers, and consumers of a knowledge of food products has led to the preparation of the following manual.

Unfortunately, many misleading statements respecting the composition of foods, their nutritive value, and their relation to health and digestion have been published and received with more or less credence by the public. Claims of superior excellence, which are entirely baseless, are constantly made for certain food products in order to call the attention of the public more directly to their value and, unfortunately, at times to mislead the public with respect to their true worth.

It is not uncommon to see foods advertised as of exceptional quality, either as a whole or for certain purposes. Many of the preparations of this kind are of undoubted excellence, but fail to reach the superior standard or perform the particular function which is attributed to them. Particularly has it been noticed that foods are offered for specific purposes or the nourishment of certain parts of the body, especially of the brain and nerves. We are all familiar with the advertisements of foods to feed the brain, or feed the nerves, or feed the skin. It is hardly necessary to call attention to the absurdity of claims of this kind. One part of the body cannot be nourished if the other parts are neglected, and the true principle of nutrition requires a uniform and equal development and nourishment of all the tissues. It is true that many of the tissues have predominant constituents. For instance in the bones are found large quantities of phosphate of calcium and in the muscles nitrogenous tissues dominate. In the brain and nerves there are considerable quantities of organic phosphorus. All of these bodies, however, are contained in normal food properly balanced.

It would be contrary to the principles of physiology to attempt to feed the bones by consuming a large excess of phosphorus in the food or the muscles by confining the food to a purely nitrogenous component. Such attempts, instead of nourishing the tissues indicated, will so unbalance the rations as to disarrange the whole metabolic process, and thus injure and weaken the very tissues they are designed to support.

It seems, therefore, advisable to prepare a manual which may be used in conjunction with works on dietetics and on physiology and hygiene and yet of a character not especially designed for the expert.

The American public is now so well educated that any average citizen is fully capable of understanding scientific problems if presented to him in a non-technical garb.

It is, therefore, not difficult to see that the great army of manufacturers and dealers in food products, as well as the still greater army of consumers, are able to receive and to utilize information concerning food products which is of common interest to all. A dissemination of knowledge of this kind will guide the manufacturer in his legitimate business and protect the public against deceptions such as those mentioned above.

In the evolution of society, economy and efficiency indicate that specializations should be made as completely as possible. For this reason it is advisable that foods of a certain character be manufactured and prepared for consumption on a large scale, so that due economy and purity may be secured. On the other hand there are many other kinds of foods which, by reason of their properties, cannot be prepared on a large scale but must be produced near or at the place of consumption. Milk is a type of this class of foods. It is altogether probable, therefore, that the consumption of manufactured foods will not decrease but increase even more rapidly than the number of our population.

In order that the people may be able to judge of the quality and character of products of this kind, information readily available appears to be highly desirable.

In the other case of the utilization of raw materials, it is equally important that the people of this country understand their nature and their functions in the digestive process. The great nutritive value of our food is found in the cereals, the meats, the fruits, and vegetables which we consume. A description of foods of this class, the places of their growth, the conditions under which they are matured and marketed, the problems which relate to their storage and transportation, their composition in respect of nutrition and digestibility, the dangers which may accrue from their decay, and the adulterations or sophistications to which they may be subjected are matters of the greatest public importance.

A treatise of this kind in order to be of its full value for which it is intended must be concise, expressed in simple language, in a form easily consulted, and yet be of a character which will be reliable and which will give full information on the subject.

It is a common habit of speech to divide foods into two great classes, namely, foods and beverages. This is not a scientific division, but is one which has been so well established by custom as to render it advisable to divide this work into two portions, one devoted to food in the sense just used and the other to beverages. The first volume of this work devoted to foods will treat of those bodies commonly known under the term “foods,”--namely, cereals, meats of all kinds, milk, vegetables, nuts, and fruits. The second volume will embrace the study of beverages, namely, natural and artificial mineral waters, soda waters, soft drinks, coffee, tea, cocoa, wines, cider, beer and other fermented beverages, distilled beverages of all kinds, and mixtures or compounds thereof.

In connection with the description of the origin of foods and their general characteristics will be given a statement of their chemical composition, especially in relation to nutritive properties. The principal adulterations or sophistications to which the food products are obnoxious will be briefly described, and where simple methods of detecting adulterations are known, of a character to be applied without special chemical knowledge or skill, they will be given.

An attempt is thus made to lay before those interested, in as compact a form as possible, the chief points connected with the production of food, its manipulation, and its use for the nourishment of the body.

It is not the intention of this manual to enter at all into the subject of cooking or the physiology of foods and nutrition. That is a distinct and separate part of this problem and has already been treated in many manuals. In this connection, however, attention may be called to the great importance of proper cooking in the use of food. Raw materials of the best character, prepared and transported in the most approved manner, may be so injured in the kitchen in the process of cooking as to be rendered both unpalatable and difficult of digestion. On the contrary, food materials of an inferior quality, provided they contain no injurious substances, may be so treated by the skilled cook as to be both palatable and nutritious. The desirability of the dissemination of correct principles of cooking is no less than that of giving information respecting the materials on which the art of cookery is exercised. It may be added that the art of cookery at the present time should not be confined to the mere technical manipulation, the application of heat and of condimental substances, but should also have some reference to the actual process of nutrition.

Foods should be prepared in the kitchen, not only of a palatable character and properly spiced but also selected in such a manner as to safeguard one of the chief purposes of food, namely, the proper nutrition of the body and the avoidance of any injury to digestion.

It is commonly admitted that many, perhaps most, of the diseases of the digestive tract to which the American people are so subject arise from the consumption of rations improperly balanced, poorly prepared, or used in great excess. To the intelligent and scientific cook the information contained in this manual will especially appeal.

A PROPER RATION.

The study of the science of nutrition has revealed the character of nourishment necessary to build the tissues and restore their waste. The term “food” in its broadest signification includes all those substances which when taken into the body build tissues, restore waste, furnish heat and energy, and provide appropriate condiments. The building of tissues is especially an important function during the early life of animals as it is through this building of tissues that growth takes place. The restoration of waste of tissues assumes special importance during that period of life when the weight of the body is supposed to be reasonably constant. At this time the waste of tissue in the natural processes is restored by the assimilation of new material in the same proportion.

If the assimilation of new material goes on at a greater rate than the waste of old material it manifests itself during the period of expected equilibrium in the deposition of adipose tissue and a consequent abnormal increase in weight.

In the after period of life the process of waste is naturally more vigorous than that of assimilation, and the tendency is manifested, which is wholly in harmony with the laws of Nature, to gradually diminish the weight of the body, and this continues to the extreme emaciation of old age.

It is evident, therefore, that the food consumed should be adapted to these changing periods. The growing animal needs a larger quantity of food in proportion to its actual weight than the animal which is in a state of equilibrium, that is, of mature age, and the animal which is entering upon the period of old age needs a less quantity of food in proportion to its weight than in either of the other periods of life. Thus, the rations of infants and children should be generous, the rations of mature man sufficient, and the rations of old age limited.

The food should also contain the various elements which enter into nutrition in the proper quantity. The nitrogenous constituents in food, when subjected to the ordinary process of digestion, yield a certain quantity of heat and energy but their more important function is to nourish the nitrogenous elements of the body, of which the muscles, hair, skin, and finger-nails are types. The mineral constituents of food, especially phosphorus and lime, have a general utility in promoting the metabolic functions, especially in the movement of the fluids of the body through the cell walls, and at the same time are actual nourishing materials, entering particularly into the composition of the bones and teeth.

The fats and oils which are present in the foods have the capacity of producing large quantities of heat and energy during their combustion in the body, and thus serve as a source of animal heat and muscular activity.

The starches and sugars which are the most abundant elements of our food, although they have a heat-forming power of less than one-half that of fats, are largely utilized in the production of heat and energy and in the formation of animal fat.

To secure a proper and complete nutrition of the body it is desirable that all these elements should be so adjusted as to provide for complete nourishment without having any one of them in great excess. It is evident that an excess of any one or more of these nutrient materials must necessarily impose on the organs of the body an additional work in securing their proper elimination. This tends to overburden the excretory organs and to cause a premature breakdown thereof. This giving away of the organs may not come for many years, not, perhaps, until advanced life, but when it comes it necessarily shortens the period of human existence.

The term =“balanced ration”= means the adjustment of nutrients in the food in such a way as to secure complete and perfect nutrition without loading the body with an excess of any one element. This is also an important point on the score of economy. A large percentage of all the earnings of man is expended for food products, and hence these products should be used in a manner to secure the best results possible. If, by a practice of scientific nutrition, 10 percent of the value of foods could be saved it would create a fund which, could it be utilized, would minister in the highest degree to the comfort and welfare of the human family and form an abundant pension for old age.

SOCIAL FUNCTIONS OF FOOD.

In the above paragraphs attention has been directed particularly to the nutritive and economic properties of food. It must not be considered that mere nutrition is the sole object of foods, especially for man. It is the first object to be conserved in the feeding of domesticated animals, but is only one of the objects to be kept in view in the feeding of man. Man is a social animal and, from the earliest period of his history, food has exercised a most important function in his social life. Hence in the study of food and of its uses a failure to consider this factor would be regrettable. For this reason it is justifiable in the feeding of man to expend upon the mere social features of the meal a sum which often is equal to or greater than that expended for the mere purpose of nutrition. This part of the subject, however, belongs especially to the kitchen and dining room, and, therefore, will not be discussed at greater length at the present time.

It is believed that a more careful study of the food he consumes will benefit man in many ways. It will lead to a wider public interest in the problem of the purity of food and the magnitude of the crime committed against mankind in the debasement, adulteration, and sophistication of food articles.

This study will impart to the social function of food an additional charm, in that the origin and character of the material consumed will be known and the properties which they possess for nourishing the body understood. This will enable man, as a social animal, to so conduct himself at table as to secure the greatest possible pleasure and social benefit therefrom and at the same time avoid any injury which ignorance might permit and invite.

It may appear that the inartistic treatment of a subject of this kind, as indicated in the following pages, is not one which is calculated to excite any sympathetic interest or appeal to the natural desire for literary and artistic expression. Yet the importance of the subject is so great as to warrant the experiment of presenting the matter in this form rather than in any more elaborate and connected way.

DEFINITION AND COMPOSITION OF FOODS.

=Food=, in its general sense, is that which nourishes the body without regard to its physical state, that is, it may be solid, liquid, or gaseous. More particularly defined, food is that material taken into the body in the ordinary process of eating which contains the elements necessary for the growth of tissues, for the repair of the destruction to which the tissues are subjected during the ordinary vital processes and for furnishing heat and energy necessary to life. Incident to the utilization of these elements there is consumed, also, a considerable quantity of matter inextricably mingled with food in a natural way, which takes no direct part in nutrition and yet which is useful, as a mass, in promoting the digestive processes. These bodies are certain indigestible cellular tissues which are present in foods, mineral matter, and other materials which are naturally found in food products. Included in this broad definition, therefore, are many substances which are usually not thought of in the sense of food; among these are water and air. Air, however, would probably be excluded because it is not introduced into the stomach, that is, not in quantities which have any significance in the vital processes. Water, on the contrary, is one of the most indispensable constituents of food and is also used in considerable quantities as a beverage. The water, itself, is indispensable to nutrition and is also one of those bodies mentioned above which are necessary to secure the proper conduct of the digestive processes.

By means of the oxygen in the air the combustion of food in the various parts of the body is secured, and thus animal heat and energy developed. In this respect the combustion of a food product is similar in every way to the burning of coal in the production of heat and motion. The same calorific laws which govern the steam-engine are applicable, in all their rigidity, to the animal engine. The quantity of heat produced by the combustion of a certain amount of fat or sugar is definitely measured in a calorimeter and is found to correspond exactly to the quantity of heat produced by the ordinary combustion of such bodies. The term “food,” therefore, in this respect, would include the oxygen of the air without which the development of animal heat and energy would be impossible. It also includes those bodies of a liquid character which are classed as beverages rather than as foods. All of these bodies have nutritive properties, although their chief value is condimental and social.

That large class of food products, also, which is known as condiments is properly termed food, since they not only possess nutritive properties but through their condimental character promote digestion and by making the food more palatable secure to a higher degree the excellence of its social function.

It is now possible to condense into a distinct expression the definition of food in the following language: Food in a general sense embraces those substances taken into the body which build tissues, restore waste, and furnish heat and energy.

CLASSIFICATION OF FOODS.

Foods may be considered under different classifications. First, as to general appearance and use three classes may be made,--foods, beverages and condiments. As types of the first division of these foods may be mentioned cereals and their preparations, meat and its preparations (except meat extracts), fish, fowl, and game. Beverages are those liquid food products which are more valued for their taste and flavor than actual nutritive value. As types of beverages may be mentioned wines, beers, distilled spirits and liquors of all characters, tea, coffee, cocoa, chocolate, etc. Under wines, in this sense, may be included the fermented beverages made of fruit juices, such as cider, perry, etc. Types of condiments are salt, pepper, spices, vinegar, etc. Milk, although a liquid substance, is hardly to be considered a beverage, and on account of its high nutritive properties may be classed, together with its preparations, under the first head.

Foods may also be classified as nitrogenous, starchy, oily, and condimental. Nitrogenous foods are those in which the proportion of their material containing nitrogen is large. Lean meat may be regarded as a type of nitrogenous food, since it consists almost exclusively of tissues known as protein and contains nitrogen and sulfur as essential ingredients. The white of an egg is also a typical nitrogenous food and, to a less extent, the yolk. Among vegetables, peas and beans are typical foods containing large percentages of nitrogenous matter. The gluten of wheat is also a typical nitrogenous food and the zein of Indian corn, corresponding to gluten, is a nitrogenous material.

Practically all the vegetables used as foods contain more or less protein in their constituents. Among the cereals oats has the largest quantity and rice the smallest of this valuable food material. Of oily foods the fat of animals, including butter, is a typical representative. All meats, fish, fowl, and game contain more or less fat. Of vegetables and fruits there are many which contain large quantities of fat, such as nuts, oily seeds, etc. All vegetables contain more or less fat, although the succulent vegetables usually contain but little thereof. Of starchy foods there are no types in animal food, the quantity of carbohydrate material therein being extremely limited. The lobster and horse-flesh contain perhaps a little more than 1 percent of carbohydrate food, but most meats contain much less than that. Sugar and starch are typical carbohydrate foods.

The cereal grains are composed largely of starchy foods, and so are certain tubers, such as the potato, cassava, etc. Of the common cereals rice contains more starch than any other and oats the least. Sugars are intimately related to starch and are included under the term starchy food or carbohydrate food. The carbohydrate matter in the flesh mentioned above, namely glycogen, is of the nature of a sugar. Among the typical sugar foods are beets, melons, and fruits, some of which contain large percentages of sugar. All fruits contain greater or less quantities of sugar, and that is true, also, of all vegetables.

Of the plants which produce the sugar of commerce there may be mentioned the sugar-cane, the sugar-beet, the maple, and palm trees. The principal sources of the sugar of commerce are the sugar-cane and the sugar-beet.

Of the condimental foods may be mentioned spices, including pepper, mustard, cinnamon, allspice, and other foods of this class. Common salt occupies a unique position in food products. It is the only mineral substance which has any value as a condiment in human food. But it also has a more important function than its condimental character, namely, it furnishes the supply of hydrochloric acid without which digestion in the stomach could not take place. For this reason common salt must be regarded as an essential food product as well as a condiment.

EXPLANATION OF CHEMICAL TERMS.

Inasmuch as this manual is not solely intended for expert chemists and physiologists but also for the general public, a simple explanation of the use of the terms used in analytical data and tables is advisable.

Under the term =moisture= is included all the water which is present in a free state, that is, not combined in any way with the ingredients of the material, and other substances volatile at the temperature of drying. The water is determined by drying to a constant weight at the temperature of boiling water or slightly above. In bodies which are easily oxidized this drying takes place in a vacuum or in an inert gas like hydrogen or carbon dioxid.

=Protein.=--Under this term is included all the nitrogenous compounds in a food product which contain in their composition sulfur, nitrogen, carbon, hydrogen, and oxygen, forming that class of tissues represented by the gluten in wheat, the white of an egg, muscular and tendinous fibers, etc.

=Ether Extract.=--Under this term is included the fats and oils, the term fat being applied to animal fat and the term oil to vegetable products. These bodies are all soluble in ether and therefore are grouped together under the term “ether extract.” There are some fats both in animal and vegetable substances insoluble in ether, but they exist in minute quantities and therefore are not separated from the extracts, but the whole matter is given together and represents practically the fats and oils in food.

There are also minute quantities of bodies not fats in foods soluble in ether, and these are included in the ether extract.

=Ash.=--The term ash is applied to the residue left after the burning of food products in the air at a low temperature until the carbon has disappeared. Ash is rather an indefinite term and is applied to that residual material of a mineral nature composed of sand or silica and the carbonates or oxids of alkaline earth or alkalies. The ash also contains the principal part of phosphorus present in food products and usually a small proportion of sulfur. These bodies in the ash exist as phosphoric and sulfuric acids or their salts.

=Fiber.=--The term fiber is applied to those carbohydrate products in food which are insoluble in solutions of dilute acid and dilute alkalies at the boiling temperature. Inasmuch as these separated bodies are not wholly pure cellulose they are often designated as crude fiber.

=Starch and Sugar.=--The terms starch and sugar are applied to the carbohydrates in a food product of a starchy or saccharine nature, together with the other carbohydrates present which are soluble in dilute acids and alkalies.

=Calories.=--The term calorie is used to denote the amount of heat-forming material contained in one unit weight of a food product. The number given represents the number of degrees of temperature produced in a unit mass of water by the heat formed in burning the unit weight of food. The unit weights employed are usually as follows: Of the food product, one gram (15 grains); unit weight of water to be heated, one kilogram (2.2 pounds); unit increment of temperature, 1°C. (1.8°F.). The expression 4000 calories therefore means that if one gram of food substance in a dry state be burned the heat produced will raise one gram of water through a temperature of 4000°C., or the unit of water (one kilogram) through a temperature of 4°C. For convenience the calories are usually expressed as small calories, namely 4000, instead of large calories, namely 4. In this manual the expression in terms of small calories, that is, the temperature increase of one kilogram of water produced by burning one gram of substance, multiplied by 1000, will be uniformly employed.

FOODS AND THEIR ADULTERATION.