Product Description
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 Excerpt: ...that this firm sells from 70,000 to 80,000 francs' worth of goods a year in Syria. Other French houses (Guerlain, Lubin, Roger & Gallet, Pinaud, Delettrez & Pivert), together with some German houses who sell very low class goods, share another 10,000 francs' worth of orders between them. SAND AS A FILTERING-MEDIUM. Dr. G. Gore has communicated to the Birmingham Philosophical Society the results of an experimental research on the "Decomposition of Liquids by Contact with Powdered Silica." By placing a solution of an acid, salt, or alkali, of known composition, which had no chemical action upon pure precipitated silica, in a stoppered bottle, adding to it 50 grains of the silica, thoroughly agitating the mixture, and after sixteen hours analysing the portion, he found the chemical composition of the film of liquid which adhered to the powder to be stronger in the chemical than the solution itself. The amount of solid abstracted from the solution varies with the kind of powder employed, its degree of fineness, the kind of dissolved substance, the proportion of powder to it, the kind of solvent, the proportion of solvent to powder, the proportion of dissolved substance to solvent, and, in a small degree, with the temperature. The union takes place quickly, and prolongation of the immersion has but little influence. Finelyprecipitated silica possesses the property in the greatest degree, and alkaline substances are the most affected; with very dilute alkaline solutions more than 80 per cent, of the dissolved substance was abstracted by the silica. The results appear to throw some light upon the purification of water by filtration through the earth and upon agriculture, and to show that the alkaline constituents of soils are retained much more b...
Chemist and druggist
Product Details
- Published on: 2012-05-16
- Original language: English
- Number of items: 1
- Dimensions: 9.53" h x 7.32" w x 2.09" l, 4.14 pounds
- Binding: Paperback
- 1076 pages
Chemist and druggist
