96 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



it is of a violet color, and lias a beautiful green metallic lus- 

 tre. 21 A, March, 1872, 251. 



CARBAZOL, A NEW ANTHRACENE DERIVATIVE. 



A new substance, called carbazol, has been discovered in 

 the process of purifying crude anthracene. This possesses 

 various peculiarities, and is convertible by heat into carbazo- 

 line, which is presented in the form of large white needles, 

 soluble in ether, alcohol, and benzole. It sublimes in needles, 

 evaporates with steam, and with acids forms salts which are 

 extremely soluble in water. 18 (7, March, 1872, 150. 



SYNTHESIS OF ORCINE. 



Messrs. Vogt and Henninger announce to the Academy of 

 Sciences in Paris that they have succeeded in forming syn- 

 thetically the substance known as orcine, the basis of the col- 

 oring matter of lichens. Numerous attempts have previous- 

 ly been made in vain to produce this body. The artificial 

 orcine appears to have all the properties of the original, and 

 its mode of formation shows that it is a diphenol or toluene. 

 6 B, April 22, 1872, 1107. 



MELOLONTHINE. 



A chemical examination of the common cockchafer or May- 

 bug (Melolontha vulgaris) has shown the presence of a new 

 crystalline substance named melolonthine by its discoverer. 

 As prepared, this is a beautiful, lustrous, crystalline body, 

 tasteless and odorless. It is soluble with difficulty in cold, 

 but most readily in hot water, and quite insoluble in alcohol 

 and ether. The aqueous solution has no action on vegetable 

 colors. Thirty pounds of the insect furnish twenty -two 

 grains of melolonthine. 21 A, Dec, 1871, 1192. 



TETRONERYTHRIN, A NEW ANIMAL COLOR. 



As is well known, grouse, pheasants, ptarmigans, and other 

 gallinacea have a red patch or wattle above the eye, this be- 

 ing so conspicuous in some species as to resemble a piece of 

 red flannel. This has lately been subjected to a careful anal- 

 ysis by Dr. Wurm, who ascertained that it contains a new 

 organic coloring material, which, he calls Tetroherythrin, or 

 grouse red. It seems to lie in the deeper strata of the epi- 



