l894-] new-york microscopical society. 89 



Systematic Survey of the Organic Coloring Matters. 

 By G. ScHULTZ and P. Julius. Translated and edited with 

 extensive additions by Arthur G. Green, London Institute, 

 London. New York : Maxmillan & Co., 1894. Pp. 205. 

 Price, $5. 



This work is devoted to the exposition of the products of coal tar. It 

 states that the average quantity of gas tar worked up per annum by the 

 whole world is 530,000 tons. In three divisions it explains the manufacture 

 and gives the formulce of the raw products, the intermediate products, and 

 the coloring matters; under this latter division tabulating 454 colors by 

 means of parallel columns under the headings : commercial name, scientific 

 name, empirical formula, constitutional formula, method of preparation, 

 year of discovery, discoverer, patents, literature, behavior with reagents, 

 shade and dyeing properties, method of employment. 



