. BIBLIOGRAPHY OF METALS OF THE PLATINUM GROUP 217 



1887: 25. G. IvRtiss and L. Hoffman. Untersuchimg liber das Gold. 



(IV. Quantitative Bestimmung des Goldes nnd seine Trennung in 



Besonderen you den Platinmetallen, p. 66.) Pt, Pd. 



Ann. Chem. (Liebig), 238 (1887), 30; J. Chem. Soc. 52 (1887), 554; 



Ztsch. anal. Chem. 27 (1888), 66. 



1887: 26. W. Bettel. Separation of gold from platinum metals. 



Pt, Pd. 

 Chem. News, 56 (1887), 133; J. Chem. Soc. 52 (1887), 1084; Chem. 

 Centrbl. 1887, 1362. 



1887: 27. H. Pirngruber. Separation of platinum from gold and 



other rare metals. (Fusion with zinc.) Pt. Pd, Ir, Rh, Os, Ru. 



Eng. and Mining J. 44 (1887), 256, 326; Ber. 21 (1888), 312; Berg 



und Hiitten Ztg. 47 (1888), 29; Chem. Centrbl. 1888, 84; J. Chem. 



Soc. 54 (1888), 656; Ztsch. chem. Indiist. 2 (1887), 306; Jsb. 



Chem. 1888, 2560. 



1887: 28. F. Wyatt. Separation of metals from platinum ores. (Re- 

 ply to H. Pirngruber.) Pt, Pd, Ir, Rh, Os, Ru. 

 Eng. and Mining J. 44 (1887), 273; Chem. Ztg. 12 (1888), Rep. 235. 



1887: 29. C. Reinhardt. Ueber die Aufsehliessung in Sauren unlos- 

 licher Platinlegirungen. Pt. 



Chem. Ztg. 11 (1887), 52; Chem. Centrbl. 1887, 230; Chem. Indus- 

 trie, 10 (1887), 192; J. Soc. Chem. Ind. 6 (1887), 389. 



1887: 30. E. J. Houston. On ])alladium alloys in watches. (Pail- 

 lard's non-magnetizable alloy.) Pd. 

 Proc. Amer. Phil. Soc. 24 (1887), 419; J. Frank. Inst. [3], 95 

 (1888), 161, 238; Chem. News, 58 (1888), 100; Chem. Centrbl. 

 1888, 1329; Dingl. pol. J. 270 (1888), 143; Jsb. Chem. 1888, 2659. 



1887: 31. H. Ostermann and A. Prip. Platinlegirung. D. R. patent 

 44473, Dec. 18, 1887. Pt. 



Ber. 21 (1888), 865; Jsb. Chem. 1888, 2659; Chem. Ztg. 12 (1888), 

 1426. 



1887: 32. . Cheap method of platinizing metals. Pt. 



.Sclent. Amer. 56 (1887), 169; from Le Genie Civil; Indust. BUit. 

 24 (1887), 207; Chem. Centrbl. 1887, 971. 



1887: 33. "W. L. Dudley. Electro-deposition of iridium. (Descrip- 

 tion of patent.) Ir. 

 Electrical Rev. 20 (1887), 604; Chem. Ztg. 11 (1887), Rep. 199. 



1887: 34. . [Description of platinum mirror on glass made 



by Dode in 1865, which is still intact.] . Pt. 



Sclent. Amer. 57 (1887), 56; from La Nature; Repert. anal. Chem. 

 7 (1887), 720. 



