This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1853 edition. Excerpt: ...solution be mixed with hydrochloric acid, there separates a mixture of cinnamic and myroxylic acid. From the hot aqueous solution, the cinnamic acid is first deposited, and, by evaporation, the myroxylic acid. It quite equals benzoic acid, but melts even at 109; first boils at 250, and is more easily soluble in water. 2. HIPPURIC ACID: =HO, NC4H3Oa(CI4H5)03=nO, NC18H8Ov Hippuric acid is found in the urine of the horse, ...., ., ., . 1. 'Hippuric aciu. the cow, and, in small quantity, also in human urine. Benzoic acid, as well as cinnamic acid, changes in animal bodies into hippuric acid, which is found in urine. By the action of acids and alkalies, hippuric acid decomposes into glycocol and benzoic acid. If the elements of 2 atoms water come to the pairling of hippuric acid NC4H302, we obtain glycocol = NC4Hj04. Horse urine evaporated to J is mixed with hydrochloric acid, the precipitate pressed out and boiled with water and milk of lime; then it is filtered, and a solution of alum added to the filtrate, until the alkaline reaction vanishes. Into the fluid cooled to 40, we bring bicarbonate of soda, until no more precipitate is formed, and from the abfiltered solution the hippuric acid is precipitated by nitric acid, and then purified by recrystallization from boiling water and treatment with animal charcoal. Crystallizes in wellformed quadratic prisms; it is deposited from the concentrated salt solution upon the addition of acid, always in distinct long needles. Reacts strongly acid, but possesses no sour taste; it fuses by a gentle heat, and stiffens to a crystalline mass; it requires 400 parts cold water for solution; easily soluble in boiling water and alcohol. By dry distillation decomposes into benzoic acid and benzoate of...