Hydrocarbons. 



4i>l. CYMENE. C 10 H 14 . (Cymol, Camphogen, Hydride of TJnjmyi, 

 Hydride of Cymyl.) 



a. Prepared from the volatile of oil of cummin. 



b. Prepared from coal tar. 



CINNAMENE SERIES. CnHjn-s. 



402. CINNAMENE. C 8 H 8 . (Styrolene, Cirmatnol, Styrol.) 



a. Colourless oily liquid. 



b. Colourless refractive solid. 



Note. Specimen b was prepared from liquid storax ; it has assumed 

 the solid appearance of meta-cinnamene. 



NAPHTHALENE SERIES. CnHsn-u. 



403. NAPHTHALENE. C 10 H 8 . 



a. Micaceous crystalline plates. 

 Note. This specimen was obtained from coal tar. 



404. NAPHTHALENE BICHLORIDE. C 10 H 8 CI 2 . 



a. Crystallized. 



A NTHRA CENE SERIES. C n H^ _ J8 



405. ANTHRACENE. C U H 10 . 



a. Crude, of a brownish colour. 

 6. Purified, in white pearly scales. 



Note. Specimen b has become tinged with purple from exposure to 

 light. 



406. ANTHRAQUINONE. C u H 8 2 . 



a. In yellowish acicular crystals. 



b. In slender crystals. 



Note. Specimen b was prepared in the laboratory of the Society by 

 Mr. E. Richardson. 



MONATOMIC ALCOHOLS AND ETHERS. 

 ETHYLIC SERIES. C H^.j. 



407. METHYL HYDRATE. C H 3 (H 0). 



a. Crude. 



b. Purified (Dr. Hasting's pyroxylic spirit). 



c. Ditto, by Eschwege's process. 



d. Methylated ethylic alcohol. 



Note. For manufacture of pyroxylic spirit, see P. J. [1] , vol. x., pp. 

 31, 69, 135, 196, 300 ; vol. ix., p. 455 ; [2] , vol. iv., p. 233 ; for Eschwege's 

 process, see P. J. [2] , vol. vii., p. 175. 



408. MKTHYL IODIDE. C H 3 1. 



a. Reddish volatile liquid. 



