Chapter 9

The oil gas is likewise applicable to the illumination of lighthouses, and among those that are now being lighted in that way we may cite the one in the port of Pillau, near Königsberg. Several large steamers are likewise being lighted on this plan. In such an application of oil gas the management of the apparatus is very easy, and the permanence of the illuminating power of the gas gives every facility for the lighting of the boat, whatever be the duration of the trip.

Although Mr. Pintsch's process of manufacture has been but recently introduced into France, it has received a number of applications that permits us to foresee the future that is in store for it. The Railway Company of the West has contracted for the lighting of 250 first-class cars that run within the precincts of the city; the State Railways have 56 cars lighted in this way running between Nantes and Bordeaux and between Saintes and Limoges; and the Line of the East has just applied the system to 80 of its cars.

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DELICATE TEST FOR OXYGEN.

T. W. Engelmann proposes, in the _Botanische Zeitung_, a new test, of an extremely delicate nature, for determining the presence of very minute quantities of oxygen, namely: its power of exciting the motility of bacteria. If any of the smaller species, especially _Bacterium termo_, are brought to rest, and then introduced into a fluid in which there is the minutest trace of free oxygen, they will immediately begin to move about freely; and if the oxygen is gradually introduced, their motion will be set up only in those parts of the drop which the oxygen reaches. In this way Engelmann was able to determine the evolution of oxygen by _Euglena_ and by chlorophyl granules.

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DETERMINATION OF SMALL QUANTITIES OF ARSENIC IN SULPHUR.

By H SCHÆPPI.

Ten grms. of sulphur, pulverized as finely as possible, are covered with hot water and a few drops of nitric acid digested for some time, filtered, and washed till the washings have no longer an acid reaction. Thus calcium chloride and sulphate are removed, and calcium sulphide, if present, is destroyed. The sulphur thus prepared is covered with water at 70° to 80°, a few drops of ammonia are added, and the mixture is digested for a quarter of an hour. All the arsenic present as sulphide is dissolved, and the ammoniacal liquid is variously treated according to the degree of accuracy required. For perfectly accurate determinations the ammoniacal solution is mixed with silver nitrate, and all the sulphur present in the state of arsenic sulphide is thrown down as silver sulphide, acidified with nitric acid, filtered, and washed. The precipitate of silver sulphide is dissolved in hot nitric acid and determined as silver chloride. From the weight of the latter the arsenic sulphide is calculated. As a less accurate but more rapid method, the ammoniacal solution of arsenic sulphide is cautiously neutralized with pure dilute nitric acid and considerably diluted. It is then titrated with decinormal silver nitrate till a drop of the solution is turned brown with neutral chromate. The arsenic is easily calculated from the quantity of silver nitrate consumed. For very rough determinations it is sufficient to treat ten grms. of finely-ground sulphur with nitric acid, to extract with ammonia, and to add silver nitrate. From the intensity of the color, or the quantity of the precipitate of silver sulphide, it may be judged if the sulphur is approximately free from arsenic or strongly contaminated. The author states that, contrary to the general belief, reddish yellow sulphur is more free from arsenic than such as is of a full yellow color.

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HOW TO PLANT TREES.

By N. ROBERTSON, Government Grounds, Ottawa.

A great deal has been written and said about tree planting. Some advise one way, some another. I will give you my method, with which I have been very successful, and, as it differs somewhat from the usual mode, may be interesting to some of your readers. I go into the woods, select a place where it is thick with strong, young, healthy, rapid growing trees. I commence by making a trench across so as I will get as many as I want. I may have to destroy some until I get a right start. I then undermine, taking out the trees as I advance; this gives me a chance not to destroy the roots. I care nothing about the top, because I cut them into what is called poles eight or ten feet long. Sometimes I draw them out by hitching a team when I can get them so far excavated that I can turn them down enough to hitch above where I intend to cut them off; by this method I often get almost the entire root. I have three particular points in this; good root, a stem without any blemish, and a rapid growing tree. This is seldom to be got where most people recommend trees to be taken from--isolated ones on the outside of the woods; they are generally scraggy and stunted; and to get their roots you would have to follow along way to get at the fibers on their points, without which they will have a hard struggle to live. Another point recommended is to plant so that the tree will stand in the direction it was before being moved; that I never think about, but always study to have the longest and most roots on the side where the wind will be strongest, which is generally the west, on an open exposure.

For years I was much against this system of cutting trees into poles, and fought hard against one of the most successful tree planters in Canada about this pole business. I have trees planted under the system described that have many strong shoots six and eight feet long--hard maple, elm, etc., under the most unfavorable circumstances. In planting, be particular to have the hole into which you plant much larger than your roots; and be sure you draw out all your roots to their length before you put on your soil; clean away all the black, leafy soil about them, for if that is left, and gets once dry, you will not easily wet it again. Break down the edges of your holes as you progress, not to leave them as if they were confined in a flower pot; and when finished, put around them a good heavy mulch, I do not care what of--sawdust, manure, or straw. This last you can keep by throwing a few spadefuls of soil over; let it pass out over the edges of your holes at least one foot.

I have no doubt that the best time to plant is the fall, as, if left till spring, the trees are too far advanced before the frost is put of the ground; and by fall planting the soil gets settled about the roots, and they go on with the season.

Trees cut like poles have another great advantage. For the first season they require no stakes to guard against the wind shaking them, which is a necessity with a top; for depend upon it, if your tree is allowed to sway with the wind, your roots will take very little hold that season, and may die, often the second year, from this very cause.

All who try this system will find out that they will get a much prettier headed tree, and much sooner see a tree of beauty than by any other, as, when your roots have plenty of fibrous roots, and are in vigorous health, three years will give you nice trees.--_The Canadian Horticulturist_.

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THE GROWTH OF PALMS.

In a paper (Russian) recently read before the Botanical Section of the St. Petersburg Natural History Society, Mr. K. Friderich describes in detail the anatomical structures to be met with in the aerial roots of _Acanthorhiza aculeata_, these roots presenting a remarkable example of roots being metamorphosed into spines. Supplementing this, E. Regel made the following remarks:

Palm trees, grown from seed, thicken their stems for a succession of years, like bulbs, only at the base. Many palms continue this primary growth (i.e., the growth they first started with) for fifty to sixty years before they form their trunk. During this time new roots are always being developed at the base of the stem, in whorls, and these always above the old roots. This even takes place in old specimens, especially in those planted in the open ground which have already formed a trunk, In such cases the cortex layer, where the roots break through, is sprung off. In conservatories, under the influence of the damp air, this root formation, on which indeed the further normal growth of the palm depends, takes place without any special assistance. When the palm is grown in a sitting room, one must surround the base of the trunk with moss, which is to be kept damp, in order to favor the development of the roots. When the base of the palm trunk has almost reached its normal thickness, then begins the upward development of the trunk, which takes place more slowly in those species whose leaves grow close together than in those whose leaves are further apart. In specimens of many species of Cocos and Syagrus, whose leaves are particularly far apart, the stems grow so quickly when planted in the open ground that they increase by five to six feet in height per annum. The stem of those palms which develop a terminal inflorescence have ended their apical growth by doing so, and wither gradually, In addition to this (withering) in the case, e.g. of _Arenga saccharifera_, new inflorescences are developed from the original axils _(Blattachseln)_ from above downward, so that one sees at last the already leafless trunk still developing inflorescences in the direction toward the base of the trunk. Almost all palms with this latter kind of growth develop offshoots in their youth at the base of their trunks, which shoot up again into trunks after the death of the primary trunk, if they are not taken off before. As to the structure of the palm trunks out of unconnected wood bundles, the assertion has been made that the palm stem does not grow thicker in the course of time, and that this is the explanation of the columnar almost evenly thick trunk. But careful measurements that were made for years have led Regel to the conclusion that a thickening of the trunk actually takes place, which probably amounts to an increase of about a third over the original circumference of the trunk.

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THE FUTURE OF SILK CULTURE IN THE UNITED STATES.

Report by CONSUL PEIXOTTO, of Lyons.

In my dispatch, No. 140, dated September 1, 1880, I referred to the fact that new machinery for reeling silk had been invented, which, in my opinion, was destined to be of great importance, and to make this industry extremely valuable and profitable in our country. I beg now to submit some additional observations upon this subject, and for the purpose of being definite, to entitle them

THE FUTURE OF SILK CULTURE IN THE UNITED STATES.

Silk reeling is at present accomplished by the use of appliances which differ only in detail from those in use many centuries ago, and which can scarcely be called machines, being rather of the nature of apparatus depending entirely upon the skill and knowledge of the operative for the results produced. In fact, even the most perfect of French and Italian reels bear about the same relation to automatic machinery that an old-fashioned spinning wheel does to our modern spinning machines.

Since the date of my previous dispatch upon this subject, the new reeling machine of Mr. E. W. Serrell, jr., of New York (who still continues in Lyons), has been undergoing improvement and development, and it is with the hope of facilitating the introduction and culture of silk, and of enabling our people to adopt the best means to that end, and to avoid errors which have been disastrous in the past and are likely to be extremely expensive in the near future, that I now communicate with the department, which is equally interested in securing new sources of industry and wealth for our people at home as for the promotion and extension of their commerce abroad.

It will be recollected that from about 1834 to 1839 there raged a great speculation in mulberry trees of a certain species (_Morus multicaulis_) destined for feeding silk worms. This speculation led to a total loss of all the time and money devoted to it, partly because of its wild and utterly unsound character, and partly because the little silk which was actually produced could not be reeled to advantage. As a result, silk culture fell into utter disrepute and for nearly a generation was scarcely thought of as a practical thing in the United States. Time, however, showed clearly where the great obstacle lay, and although many may have imagined that other difficulties led to its abandonment in 1839-40, those who have studied the matter are unanimously of the opinion that the want of reeling machinery has alone prevented the success of sericulture in those parts of the Union which are suitable for it. Believing this obstacle to be removed, it remains to set forth in a brief manner some of the points upon which, it appears to me, the successful introduction of silk raising will depend.

For the success of silk culture in our country two things are now requisite--the acquisition on the part of those about to engage in it of sound knowledge of its processes and requirements, and proper organization.

The details of the work of silk culture are of such a nature that they may be readily understood, and I apprehend that there will be little difficulty found by those who engage in it in mastering them, after some little experience. The point at which it seems to me that there is the most danger is at the very beginning.

In order to avoid delays and losses, the person who begins silk culture should have a pretty clear idea of the scale of operations which are likely to be most profitable; of the trees, or rather shrubs, which must be obtained; of the apparatus and fixtures necessary, and of the results which may be reasonably expected from the labor and expense required. All of these items will be found to vary in different parts of the country, and I fear that general rules, broad deductions, and such information as would apply under all circumstances and in all places would be extremely difficult to formulate, and too vague for practical use at any given point.

In fact, as far as information which may be considered perfectly general is concerned, I have, for the time being, only one point to put forward in addition to what has already been published in the United States, which is to repeat and show as emphatically as possible that the use of the reels at present employed for the filature of silk is entirely impracticable in our country, and that the raiser must sell his cocoons.

This has been so often said and so clearly shown that I should consider it unnecessary to repeat it had not my attention been called to the fact that the success of several people and associations in the United States in raising cocoons has again made it a temptation to endeavor to reel silk, and during the past year I have received applications from people in different States for information as to the kind of silk reel employed here which would be most suitable for use by them.

I am aware, also, that estimates have been made and published by some eminent authorities tending to show that this work could be done on a paying basis in some places in America. So far as I have seen them, however, these estimates are fatally defective in that they do not allow for differences in quality of silk reeled by competent or incompetent people, and under circumstances favorable or otherwise, but seem to assume that any silk reeled in our country would be a first rate article, and paid for accordingly.

While this might be true in isolated cases, it could not be true in general, as with present appliances the art of reeling _good_ silk is only to be acquired and retained by years of apprenticeship and constant practice joined to a natural talent for the work. So true is this, that even in districts where the work has been largely carried on for many generations, quite a large proportion of women who try for years find it impossible to become good reelers.

Now, there is a considerable difference in price between well reeled and poorly reeled silk--a difference so great that silk not well reeled in every way is not worth as much as the cocoons from which it is derived. It is, therefore, quite a hopeless task to reel silk unless the reeler is skilled. Even if it could be done to advantage--which I do not think it could--there exists in America no means of training reelers. In Europe they are taught by degrees in the filatures, working first at the easier stages of the operations, and afterward being helped forward under the eyes and guidance of experienced operatives.

Another grave defect in the estimates alluded to is that all the profit is assumed to be paid to the reeler. This can evidently only be the case when each reeler runs her own reel, owns and cares for her own cocoons, sells her own silk, and furnishes her own capital. Now, even supposing that persons so fortunately placed as to be able to fulfill all these conditions should wish to engage in silk reeling, which is in the highest degree improbable, there exists an almost insuperable obstacle to the production of good silk except by an establishment large enough to use the cocoons of many producers.

Nearly every silk crop as raised by the individual growers contains three or four grades of cocoons, and to produce good and uniform silk, these must be separated and each sort reeled by itself, producing several grades of silk.

Without going into detail, it is enough to say that this is not practical for those who attempt to reel their own cocoons, and that for this reason, and many others, hand reels and single basins have been nearly abandoned even in Italy; the women finding so much difficulty that they prefer to sell their cocoons and work in large establishments where the work is done to more advantage.

It is evident, therefore, that, from the estimates made, there should be a considerable deduction for poor workmanship, and another for use of capital, organization, selling expenses, superintendence, insurance, repairs, deterioration, etc. In fact, I do not see in what way the reeling of silk in the United States, by the ordinary method, could be made to bear a much higher charge for labor than that borne by European filatures, which barely pay with labor at one franc per diem of thirteen hours.

To be able, then, to reel silk by the ordinary reels, it would first be necessary to find a sufficiency of highly skilled operatives willing to labor in a factory thirteen hours per day for twenty cents each. I sincerely believe and hope that this can never be done. I have enlarged somewhat upon this difficulty for the purpose of showing that the growers, or at any rate individual growers of cocoons, should not attempt to do the reeling, but by no means with an idea of discouraging the raising of silk worms, which is and should be an entirely separate matter. To use a rough comparison, I should esteem it as wasteful, even if possible, for each grower to attempt to reel his own cocoons as for each farmer to grind his own wheat upon his farm and endeavor to sell the flour.

It is, therefore, clear that the object of the sericulturist should be to raise and market as good a crop of cocoons as possible to the best advantage, and with the least possible expense and risk.

After what has been said, it may be very properly asked, if, seeing that the hopes which have been entertained of reeling by the usual method have proved fallacious, and as no radically new system of raising silk worms is under consideration, it is not very possible that all hopes of profit from rearing the worm may prove fallacious also.

In fact, not only has the question been asked, but an argument of great apparent strength and much plausibility has been formulated and extensively circulated, tending to show that the difficulty of cheap labor, which it has been shown stood in the way of reeling without improved machinery, will make the raising of cocoons also a hopelessly unprofitable task.

Briefly summarized, this argument may be stated as follows:

First. To raise silk worms to advantage much time and attention are required.

Second. Time and attention are more costly in the United States than in other countries.

Third. Consequently, cocoons can be more cheaply raised in other countries than in the United States.

Fourth. The United States possess no special advantages as a market for cocoons, and therefore they must be sold as cheaply as elsewhere, and the labor costing more, there is less profit.

Fifth. The profits made by raisers in Europe are not very great, and as they would be less in the United States, it is not worth while to try to raise cocoons in that country.

It must be acknowledged that upon the surface this all appears to be very sound and almost unanswerable, but I hope to be able to show that there is in reality not the slightest real foundation for the conclusion to which this argument points.

Taking the points cited in order, I would say, as regards the first and second, that although labor and time are required to raise cocoons, I am convinced that the labor and time of the kind necessary will not be found more expensive in our country than in Europe, for the following reasons:

The work is a home industry. It can be carried on without severe manual labor except for a few days, at the end of the season, when large crops are raised.

Now, nothing is better known than that there exists in many of our States an enormous number of wives and daughters of country people of a class entirely different from any to be found elsewhere, except, perhaps, to a limited extent, in England. I refer to the "well-to-do" but not wealthy agricultural and manufacturing classes in small villages.

One or two generations ago the farmers' and mechanics' wives and daughters found plenty of work in spinning, weaving, dyeing, cutting, and making the linen and clothes of the family. This has entirely ceased as a domestic industry with the exception of the "sewing" of the women's clothes and men's underwear. As a consequence, the women of the family are condemned to idleness, or to the drudgery of the whole household work.

Upon a proper occasion I think that much might be said of the evils and dangers which are likely within a short time to arise from the fact that perhaps a large majority of American women find themselves, because of the present organization of society and industry, almost unable to contribute to the family income except by going away from home, or in doing the most menial and severe labor as household workers from one end of the year to the other. I shall at present, however, only point out that in hundreds of thousands of homes in the country an opportunity of gaining a very moderate sum in addition to the present income by the expenditure of some weeks of care and light work would be hailed as a Godsend, and that, too, in families where the feeling of self-respect and the desire to keep the family together are far too strong to permit the women to go away from home in any way to earn money.