236 BIBLIOGRAPHY OF METALS OF THE PLATINUM GROUP 



1890: 45. E. H. Griffiths. On the determination of some boiling and 

 freezing points by means of the platinum thermometer. Pt. 



Phil. Trans. London, 182 A. (1891), 43; Proc. Eoy. Sec. London, 

 48 (1890), 220; J, Chem. Soe. 60 (1891), 251. 



1890: 46. H. L. Callendar and E. H. Griffiths. On the determina- 

 tion of the boiling point of sulphur and on a method of standard- 

 ising platinum resistance thermometers by reference to it. Pt. 

 PhiL Trans. London, 182 A. (1891), 119; Chem. Centrbl. 1891, ii, 

 252; Chem. News, 63 (1891), 1; J. Chem. Soe. 60 (1891), 1146; 

 Ztsch. physik. Chem. 7 (1891), 332; Ztsch. anal. Chem. 31 (1892), 

 549. 



1890: 47. E. E. Liesegang. (Platinum metals in photography.) 



Pt, Ir, Pd, Os. 

 PholJbg. Archiv, 31 (1890), 170; Dingl. pol. J. 283 (1892), 19; Chem. 

 Ztg. 14 (1890), Rep. 270. 



1890: 48. F. P. Perkins. Note on the displacement of silver by plati- 

 num and palladium (in toning photographs). Pt, Pd. 

 Chem. News, 61 (1890), 87; Chem. Centrbl. 1890, i, 577. 



1890:49. L.Clark. " Platinum toning," London, 1890. Pt. 



Ding-1. pol. J. 283 (1892), 18. 



1890: 50. Gastein. (Platinum in photography.) Pt. 



Bui. soe. frang. photog. 1890, 21; Dingl. pol. J. 283 (1892), 19. 



1890: 51. . Ein neues Platintonsalz. Pt. 



Photog. Archiv, 31 (1890), 33; Chem. Centrbl. 1890, i, 552. 



1890: 53. Lenhard. (Platinum in photography.) Pt, 



Photog. Corresp. 1890, 107; Dingl. pol. J. 283 (1892), 19. 



1890: 53. Masse, (Platinum in photography.) Pt. 



Photog. Nachr, 1890, 165; from La Nature; Dingl. pol. J. 283 



(1892), 18. 



1890: 54. Blanchard. (Platinum in photography.) Pt. 



Photog. Rundsch. 1890, 22; Dingl. pol. J. 283 (1892), 18. 



1890: 55. Harrison. (Platinum in photography.) Pt. 



Bui. assoc. Beige photog. 1890, 523; Dingl. pol. J. 283 (1892), 19. 



1890: 56. . Neues Platintonverfahren. Pt.- 



Phot. Mittheil. 26 (1890), 323; Chem. Ztg. 14 (1890), Rep. 122. 



1890: 57. C. Berthiot. (Iridium in photography.) Ir. 



Photog. Notizen, 1890, No. 309; Dingl. pol. J. 283 (1892), 18. 



1890: 58. . (Iridium chlorid paper in photography.) Ir. 



Phot. Mittheil. 27 (1890), 139; Chem. Ztg. 14 (1890), Rep. 270. 



