148 
Proceedings of Eoycd Society of Edinburgh. [sess. 
No. of 
Plate. 
Thermo-electric Series. 
Sign of trans. 
effect in 
comp, metals. 
Rotatory coefficient, 
It, for alloy for 
field 5610. 
It from 
composition. 
I. 
19 "5 Bis 1 Anti . 
- + 

11-65 
-2-67 
II. 
10 Bis 1 Anti 
- + 
— 
5-67 
-2-56 
III. 
4 Bis 1 Anti 
“ + 
— 
5-26 
-2-27 
B. 
Bis (pure) . 
- 
- 
2-80 
-2-8 
IV. 
2 Bis 1 Anti 
- + 
— 
1-36 
-1-92 
Y. 
19 "5 Bis 1 Lead . 
-0 
— 
0-155 
-2-66 
YI. 
9 • 8 Bis 1 Lead . 
-0 
0 
-2-54 
YII. 
4*9 Bis 1 Lead . 
-0 
+ 
0-136 
- 2'35 
Anti .... 
+ 
+ 
0-191 
Anti . . . 
+ 
+ 
0-174 
+ 0-174 
VIII. 
6 Anti 1 Zn 
— [- 
+ 
0-144 
+ 0*13006 
XII. 
806 Anti 406 Zn 121 Bis 
+ + - 
+ 
1-44 
-0-1385 
IX. 
806 Anti 406 Zn . 
+ + 
+ 
1-06 
+ 0*1161 
XIV. 
806 Anti 696 Cd 406 Zn 
+ + + 
+ 
3-96 
+ 0-07357 
XIII. 
806 Anti 696 Cd 150 Bis 
_j — 1- — 
+ 
1-18 
-0-16971 
X. 
1 Anti 1 Cd 
+ + 
+ 
1*60 
+ 0-08727 
XI. 
806 Anti 696 Cd . 
_l — J- 
+ 
6-06 
+ 0-09308 
The plates are numbered as in the previous communication. 
In the second column the alloys and their composition by weight 
are given. 
In the third the signs of the transverse effect in the component 
metals are given. 
In the fourth the values of R, calculated from the transverse 
effect observed for a given field strength, are found. 
In the fifth are given the values of R on the assumption that 
the transverse effect in the alloy can be calculated from the values 
in the component metals. The values for bismuth and antimony 
are taken from the results given in the table ; for cadmium and 
zinc the values given by Ettingshausen and Xernst, given in the 
previous table, were used. 
This last assumption has no application, it will be seen. In Plates 
I, II., III., VIII., IX., X., XI., XII., XIII., the actual values of 
R have no relation whatever to those obtained from it. The 
results given in the above table are all for the same field strength : 
it is well known, however, that the value of R for bismuth 
decreases as the field increases : this was found to be the case 
also with the bismuth-antimony and bismuth-lead alloys : in the 
others only a small decrease was observed between fields 5000 and 
II, 000 ; after that R is constant. Thus, for antimony and Plates 
