Report of the Army Medical Department, Great Britain Volume 20 (Paperback)

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. 1880 Excerpt: ...charcoal and silicated carbon, only four series were carried out, and the chlorine was not determined. In the 3rd series the solution of albumen was made with 3 ccs. of fresh white of egg to 10 gallons of distilled water. The distilled water in this instance was not quite pure, having been obtained from a chemist and druggist, our own still being out of order at the time. Appended are the tables of actual results, and also tables of the changes per cent, produced by the different filtering media. In each series the original solution was carefully analysed at the same time as portions of it were put into ithe different filters. The results are as follows: --1. The chlorine has hardly been altered to any material extent, except in the 3rd series by the spongy iron filter. This is a point that is quite unimportant. 2. The organic matter, as indicated by the oxygen required for its destruction, and by the albuminoid ammonia found, was largely diminished by all the filters, but lea3t of all by the loose animal charcoal, a result rather unexpected when compared with that of former experiments. The sample of charcoal was understood to be the best commercial article in the market. 3. The intermediate products, viz., the free (or saline) ammonia and the nitrous acid were affected as follows: --a. The carferal and silicated carbon removed a considerable quantity of the free ammonia in all cases, except the final series, in which the silicated carbon was not tested. b. The spongy iron increased the free ammonia in all except the first series. c. The nitrous acid was diminished throughout, except in the 2nd series, where it was slightly increased in the case of the charcoal. Throughout the experiments the superiority lay with the carferal and the large spongy iron filter.