A Comprehensive Treatise on Inorganic and Theoretical Chemistry

6 INORGANIC AND THE ORE TI CAIL, CHEMISTRY
been reported—by J. J. Berzelius, A. G. Beteohtin, S. Bleekrode, M. Booking,
C. Claus, P. Collier, H. St. C. Deville and H. Debray, L.. Duparc and co-workers,
R. A. Farquharsen, A. Frenzel, F. A. Genth, A. Hadding, G. C. Hoffmann,
E. Hussak, J. F. Kemp, S. Kern, I. Koifman, N. von Kokscharoff, M. M. Kositzky,
A. Kromeyer, P. Krusch, J. J. Kyle, A. Leplay, W. J. Martin, G. Osann, S. P. de
Rubies, S. F. Shemtschushny, Ii. F. Svanberg, A. Terreil, G. Tschernik,
H. N. Warren, and F. Weil. The following is a selection :
Pt Pd .Rh Ir (Ir.Os)
Colombia . 76-82-86-20 0-50-1-66 1-22- 3-46 0-85-2-52 0-95- 7-98
California . 76-50-90-24 O-10-1-95 0-65- 3-39 0-85-4-29 0-68-22-55
Canada . . 68-19-78-43 0-09-0-26 1-70- 3-IO 1-04-1-21 3-77-14-62
Urals . . 68-72 86-5O O-14-1-87 0-30 11-07 0-83 5-32 0-57-3-85
Atxstralia . 59-80-61-40 1-50-1-80 1-50- 1-85 1-10-2-20 25O- 26-O
The iron ranged from 2-3O to 9-78 ; the copper, from 0-21 to 5-20 ; the gold, from
0-3O to 315 ; and the osmium, from 0-19 to 1-13. S. P. de Rubies observed 0-1
per cent, of nickel and cobalt, in some platinum from Kitlim, Urals ; and
H. N. Warren found thallium in a number of platinum ores ; and W. F. Seyer
found that som