746 Proceedings of the Koyal Society of Edinburgh. [Sess. 
Table X.— Ratios obtained from the Analysis of Potassium Bromoplatinate. 
Comparison of Platinum with Potassium Bromoplatinate and with Silver Bromide. 
Experiment. 
Parts of Pt = 
100 ‘00 parts of 
K 2 Br 6 . 
Atomic Weight 
of Platinum. 
Parts of Pt = 
100*00 parts of 
4AgBr. 
Atomic Weight 
of Platinum. 
Parts of Pt — 
100-00 parts of 
2AgBr. 
Atomic Weight 
of Platinum. 
o &D 
03 O ^ 
-e© 
a T 
Ph II 
Atomic Weight 
of Platinum. 
, <=>=+-1 
^ o 
CQ 
73 g 
PL, £ 
<M C3 P-l 
M Pnpq 
, o &o 
o 
Ph II 
Atomic Weight 
of Platinum. 
22 
34-985 
195*12 
25-981 
195-17 
5P961 
195-16 
100-244 
195-29 
200-485 
195-28 
23 
35-007 
195*21 
25-989 
195-23 
51-976 
195-22 
100-242 
195-28 
200-479 
195-26 
25 
35-013 
195-29 
25-995 
195-27 
51-981 
195-25 
100-236 
195-24 
200-441 
195-13 
26 
35-012 
195-28 
25-991 
195-25 
51-990 
195-27 
100-226 
195-16 
200-478 
195-26 
27 
35-008 
195-25 
25-988 
195-22 
51-980 
195-24 
100-223 
195-13 
200-458 
195-19 
28 
35-004 
195-20 
25-990 
195-24 
51-974 
195-21 
100-225 
195-15 
200-455 
195-17 
35-005 
195-21 
25-989 
195-23 
51-977 
195-22 
100-233 
195*21 
200-466 
195-22 
Table XI. — Comparison of Silver with Platinum and with Potassium 
Bromoplatinate. 
Experi- 
ment. 
Parts of 
Pt 
= 100-00 
parts of 
4Ag. 
Atomic 
Weight 
of Pla- 
tinum. 
Parts of 
Pt 
= 100-00 
parts of 
2Ag. 
Atomic 
Weight 
of Pla- 
tinum. 
Parts of 
K 9 PtBr fi 
=100-00 
parts of 
4Ag. 
Atomic 
W eight 
of Pla- 
tinum. 
Parts of 
K 2 PtBr fi 
= 100-00 
parts of 
2A g. 
Atomic 
Weight 
of Pla- 
tinum. 
22 
45-226 
195-16 
90-456 
195-17 
174-50 
195-27 
34901 
159-29 
23 
45-233 
195-19 
90-470 
195-20 
174-47 
195-14 
348-95 
195-15 
25 
45-251 
195-26 
90-491 
195-25 
174-49 
195-21 
348-94 
195-13 
26 
45-243 
195-24 
90-502 
195-27 
174-46 
195T3 
348-99 
195-24 
27 
45-251 
195-27 
90 485 
195-23 
174-51 
195-30 
348-95 
195-15 
28 
45-238 
195-23 
90-489 
195-24 
174-47 
195T6 
349-00 
195-26 
45-240 
195-22 
90-482 
195-23 
174-49 
195-20 
348-97 
195-20 
If we now collect the several average values, rejecting those in which 
the weight of original salt is concerned, we have — 
For 
K 2 PtCI 6 
from the ratio of Pt 
to 
4AgCl . 
. 195-21 
33 
33 
3 3 
33 
Pt 
33 
2AgCl . 
. 195-24 
3 5 
3 3 
3 : 
33 
Pt 
33 
4Ag 
. 195-22 
33 
3.3 
33 
33 
Pt 
33 
2Ag 
. 195-23 
33 
(NH 4 ) 2 PtCl 6 
3 3 
3 3 
Pt 
33 
6AgCl . 
. 195-22 
33 
33 
33 
* 3 
Pt 
33 
6Ag 
. 195-22 
33 
(NH 4 ) 2 PtBr 6 
33 
3 3 
Pt 
33 
6AgBr . 
. 195*22 
33 
33 
* 3 
33 
Pt 
33 
6Ag 
. 19521 
33 
K. 2 PtBr 6 
. . 
33 
Pt 
33 
4AgBr . 
. 195-23 
33 
33 
33 
33 
Pt 
33 
2AgBr . 
. 195-22 
33 
33 
,, 
33 
Pt 
33 
4Ag 
. 195-22 
3 3 
33 
*3 
33 
Pt 
33 
2Ag . 
. 195-23 
Final Mean Value 
. 195-23 
