146 Proceedings of the Poyal Society of Edinburgh. [Sess. 
values of x ; but when we consider the difficulty of measuring A, c v and c 2 
— for, to economise material, small quantities were used, — the results, such 
A. 
X. 
From I. and III. 
From I. and II. 
150 
75 
9-2 
100 
66 
8-9 
70 
6-2 
7-4 
50 
6-4 
7-3 
30 
6*1 
63 
10 
7 3 
9*1 
as they are, make it very probable that the colour change is due to the 
anhydrous bromide changing into the hexahydrate. 
(Issued separately April 22, 1913.) 
