The Quinologist Volume 3 (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: ...which must be practically free from alumina, iron and magnesia, Bud before tho Society of Public AnaljiU of Grut Driuln. is thrown in by small quantities at a time. Great care must be exercised that no lumps are introduced into the liquor, for they will fall to the bottom, and thus a large excess of chalk may be used; it is advisable to mix the chalk with water, to the consistence of cream, or rather thicker, and pour the mixture in very gradually, taking great care that the contents of the vat do not overflow. The lime carbonate must be most accurately weighed, as the quantity of sulphuric acid necessary to decompose the citrate of lime can then be calculated. My practice was to estimate the amount of citric acid in the juice, and then, after analyzing the chalk, calculate the amount which was required; when all the chalk has been added, the mixture must be boiled for half an hour, agitating the whole time. The citrate of lime is now allowed to settle; the supernatant liquor, if found free from citric acid, is run off; and for this purpose two holes may be made in the vat, one just above the citrate of lime deposit, and another six inches above. Notice must be taken where the citrate of lime rises to, as this will be the same in all cases if the same quantity and strength of juice be used; these holes may have gun metal taps in them, or tubes with India-rubber and a clip. If taps are not convenient, have a large siphon; anything so that it will run the water off quickly. The object to be gained is to wash the citrate of lime as speedily as possible. Near this vat must be placed a citrate of lime washer, which consists of a frame made of wood, about six to eight inches deep, having a wooden bottom perforated with holes a quarter of an inch in diameter, and ...