OF THE METALLIC CARBIDES. 17 



BoTTGER. Ann. Chem. 109, p. 351. 



ToRREY. Jsb. Chem. (1859) p. 222. See also, Ber. d. chem. Ges. 21, ref. 609. 



Vivian. Ann. Phil. 21, p. 121. 



Crova. C. R. 55, p. 435, and Ztschr. Chem. Pharm. (1862) p. 598, and J. prakt. 



Chem. 88, p. 124, also Jsb. Chem. (1862) p. 442. 

 See Ann. Chem. 118, p. 330, Chem. News, VII, p. 2, and Chem. Centrbl. (1863) 



p. 80. 

 NiCKLES. C. R. 55, p. 505. 

 Brown. J. prakt. Chem. (1839) 17, p. 492. 

 Reiser. Am. Chem. J. 14, p. 285, and Abs. J. Chem. Soc. 62, p. 1416. 



GLUCINUM AND CARBON. 



P. Lebeau describes the preparation of a compound to which he gives 

 the formula GI4C3. Henry advances the formula Gl.^C for Lebeau's com- 

 pound. It is prepared by heating for ten minutes a mixture of glucinum 

 oxide and carbon (Zuckerkohle) ; the current used was 950 amp., 40 volts. 

 With a weaker current a nitrogen-containing compound results. GI4C3 

 forms fine crystals, sp. gr. = 1.9, brownish-yellow color, and resembling 

 AI4C3 in many of its properties. It is very hard, and by decomposition 

 with H2O methane is produced. 



LITERATURE. 



P. Lebeau. Sur un carbure de glucinum. C. R. (1895) "^i, p. 496, or Chem. Centrbl. 



(1895) 66, pt. 2, p. 959, or Abs. J. Chem. Soc. (1896) 70, pt. 2, p. 169, or Bull. Soc. 



Chim. (1S95) [3] i3»P- 1065. 

 Henry. A propos du carbure de glucinum. C. R. (1895) 121, p. 600, also Bull. Soc. 



Chim. (1896) [3] 15, p. 165. 



IRIDIUM AND CARBON. 



IrC4 results by heating thin strips of iridium in the alcohol flame. The 

 product forms a velvet-black coating. It is inflammable, and burns, leav- 

 ing a residue of Ir. The oxide of Ir heated in the presence of some 

 hydrocarbons yields IrC4, with a display of incandescence. (Berzelius.) 



LITERATURE. 



Berzelius. Einige nachtragliche Beobachtungen liber das Ir und das Os. (Pogg.) Ann. 



der Phys. 15, p. 208. 

 Gmelin. (Watt's transl.) Handbook of Chemistry (1849), VI, p. 375. 

 Berzelius. Lehrbuch der Chemie (1836), III, p. 223. See also, 

 Moissan. Sur la solubilite du carbone dans le rhodium, I'iridium, et le palladium. C. R. 



123, p. 16, or Bull. Soc. Chim. (1896) [3] 16, p. 1292. 

 Moissan. Research on the metallic carbides. Chem. News (1896), 74, p. 15. 



IRON AND CARBON. 



The subject of carbon in iron and steel has been extensively discussed, 

 but not always from a chemical standpoint. The mechanical effect of 

 carbon in iron and steel is studied often without taking into consideration 



