Prominent among these are glycerin and succinic acid.
Glycerin soap ordinarily consists of about equal parts of pure hard soap and glycerin (the latter valuable for its emollient properties).
Hydriodic acid reduces it to glycerin and nitric oxide.
Torino, 1847) by acting with a mixture of strong nitric and sulphuric acids on glycerin at the ordinary temperature.
In 1855, reviewing the various substances that had been obtained from glycerin, he reached the conclusion that glycerin is a body of alcoholic nature formed on the type of three molecules of water, as common alcohol is on that of one, and was thus led (1856) to the discovery of the glycols or diatomic alcohols, bodies similarly related to the double water type.
The valerianic;ester of guaiacol is known as geosote, the benzoic as benzosol,' the salicylic as guaiacolsalol, while the glycerin ether appears as guaiamar.
These discoveries of Geoffroy and Scheele formed the basis of Chevreul's researches by which he established the constitution of oils and the true nature of soap. In the article Oils it is pointed out that all fatty oils and fats are mixtures of glycerides, that is, of bodies related to the alcohol glycerin C 3H5(OH)3 i and some fatty acid such as palmitic acid (C 16 H 31 0 2)H.
These comprise gummy and albuminous matters, acid, salts, glycerin and other matters of which we have so far little knowledge.
Glyceryl esters of organic acids, into glycerin and a soap (see Chemical Action).
To deaden the vibration of the springs after a load has been placed on the platform, and thus to enable the weights and values of the goods to be read rapidly, the piston of a glycerin cylinder is attached to the end of the lever which pulls upon the hook of the horizontal bar and is worked by it in the glycerin.