Category: Science - Earth/Agricultural/Farming
II. CONTINUOUS FILTERS AND THEIR CONSTRUCTION 5 Sedimentation-basins 8 Size of Filter-beds 10 Form of Filter-beds 11 Covers for Filters 12 III. FILTERING-MATERIALS 20 Sand 20 Sands Used in European Filters 24 Effect of Size of Grain Upon Efficiency of Filtration 30 Effect of G...
II. CONTINUOUS FILTERS AND THEIR CONSTRUCTION 5 Sedimentation-basins 8 Size of Filter-beds 10 Form of Filter-beds 11 Covers for Filters 12 III. FILTERING-MATERIALS 20 Sand 20 Sa...
2. CHAPTER I.The rapid and enormous development and extension of water-works in every civilized country during the past forty years is a matter which deserves our most careful consideration,...
3. CHAPTER II.Filtration of water consists in passing it through some substance which retains or removes some of its impurities. In its simplest form filtration is a straining process, and th...
4. CHAPTER III.The sand used for filtration may be obtained from the sea-shore, from river-beds or from sand-banks. It consists mainly of sharp quartz grains, but may also contain hard silicat...
5. CHAPTER IV.The rate of filtration recommended and used has been gradually reduced during the past thirty years. In 1866 Kirkwood found that 12 vertical feet per day, or 3.90 million gallon...
6. CHAPTER V.When a filter has become so far clogged that it will no longer pass a satisfactory quantity of water with the allowable head it must be cleaned by scraping off and removing the...
7. CHAPTER VI.The first filters for a public water-supply were built by James Simpson, engineer of the Chelsea Water Company at London in 1829. They were apparently intended to remove dirt fr...
8. CHAPTER VII.By intermittent nitration is understood that filtration in which the filtering material is systematically and adequately ventilated, and where the water during the course of fil...
9. CHAPTER VIII.The ideal water in appearance is distilled water, which is perfectly clear and limpid, and has a slight blue color. When other waters are compared with it, the divergences in co...
10. CHAPTER IX.The coagulation of water consists in the addition to it of some substance which forms an inorganic precipitate in the water, the presence of which has a physical action upon the...
11. CHAPTER X.The term mechanical filters is used to designate a general class of filters differing in many respects quite radically from the sand filters previously described. They had their...
12. CHAPTER XI.This system, invented and patented by Director Fischer of the Worms water-works, consists of the filtration of water through artificial hollow sandstone tiles, made by heating a...
13. CHAPTER XII.The filtration of ground-waters is a comparatively recent development. Ground-waters are filtered by their passage through soil generally much more perfectly than it is possible...
14. CHAPTER XIII.Having now reviewed the most important methods in use for the treatment of waters, we may take a general view of their application to various classes of waters. Different raw wa...
15. CHAPTER XIV.One of the most characteristic and uniform results of the direct pollution of public water-supplies is the typhoid fever which results among the users of the water. In the Engli...
16. Part II. Systematic Pomology 12mo, 1 50Downing’s Fruits and Fruit-trees of America 8vo, 5 00 Elliott’s Engineering for Land Drainage 12mo, 1 50 Practical Farm Drainage 12mo, 1 00 Green’s Principles of American Forest...
17. Part IV. Higher Structures 8vo, 2 50Morison’s Memphis Bridge 4to, 10 00 Waddell’s de Pontibus, a Pocket-book for Bridge Engineers 16mo, morocco, 2 00 Specifications for Steel Bridges 12mo, 1 25 Wright’s Designing...
18. Part III. A Treatise on Brasses, Bronzes, and Other Alloys and theirConstituents 8vo, 2 50 Thurston’s Text-book of the Materials of Construction 8vo, 5 00 Tillson’s Street Pavements and Paving Materials 8vo, 4 00 Waddell’s De Pontibus. (A Pocket...
19. Part II. Form, Strength, and Proportions of Parts 8vo, 3 00MacCord’s Elements of Descriptive Geometry 8vo, 3 00 Kinematics; or, Practical Mechanism 8vo, 5 00 Mechanical Drawing 4to, 4 00 Velocity Diagrams 8vo, 1 50 MacLeod’s Descriptive...
20. Part II. Form, Strength, and Proportions of Parts 8vo, 3 00Kent’s Mechanical Engineers’ Pocket-book 16mo, morocco, 5 00 Kerr’s Power and Power Transmission 8vo, 2 00 Leonard’s Machine Shop, Tools, and Methods 8vo, 4 00 * Lorenz’s Modern...
21. Part III. A Treatise on Brasses, Bronzes, and Other Alloys and theirConstituents 8vo, 2 50 Text-book of the Materials of Construction 8vo, 5 00 Wood’s (De V.) Treatise on the Resistance of Materials and an Appendix on the Preservation of Timber...
22. Part II. Design, Construction, and Operation 8vo, 6 00Handbook of Engine and Boiler Trials, and the Use of the Indicator and the Prony Brake 8vo, 5 00 Stationary Steam-engines 8vo, 2 50 Steam-boiler Explosions in Theory and in Prac...
23. Part II. Form, Strength, and Proportions of Parts 8vo, 3 00Kerr’s Power and Power Transmission 8vo, 2 00 Lanza’s Applied Mechanics 8vo, 7 50 Leonard’s Machine Shop, Tools, and Methods 8vo, 4 00 * Lorenz’s Modern Refrigerating Machinery....
24. Part III. A Treatise on Brasses, Bronzes, and Other Alloys and theirBarringer’s Description of Minerals of Commercial Value. Oblong, morocco, 2 50 Boyd’s Resources of Southwest Virginia. 8vo, 3 00 Map of Southwest Virginia Pocket-book form, 2 00...