360 



Mr. G. F. Emery. 

 Sulphate of Copper, D. 

 Concentration = 0-6032 3 = 7'8 



[Apr. 



= 0-2011 

 = 0-1005 

 = 0-0402 



.9 = 8-05 

 3 = 8-3 

 .9 = 8-5 



These were all very satisfactory. The value of 

 solution agrees with that found by M. Bouty. 



for the stroi 



Nitrate of Copper, E. 



Concentration = 0'384 

 = 0-192 

 = 0-096 

 = 0-0384 

 = 0-0137 



Another stock solution gave 



Concentration = 0'25 

 = 0-5 

 = 1-0 

 = 2-0 

 = 4-0 



3 = 6-5 

 3 = 6-67 

 3 = 7-157-31 

 $= 7-8 

 ^ = 8-5 



= 6-618 



= 5-5835-577 



= 6, also 7-1767-083 



= 7-018 



= 6-39 



These last very strong solutions do not seem to follow any rule, 

 last two were quite oily. The 0*25 concentration is the only 

 within the range of the first set of experiments with which it fits 

 very fairly. 



Acetate of Copper, F. 



Concentration = 0*25 $ = 16*4 It may be higher, but < IS 

 = 0-125 S = 14-7 Varied from 137 15'6 



= 0-0625 $ = 12-1 



This last of the copper salts was not at all satisfactory, but the 

 suits with it are very interesting, as the values of are all far a 

 anything others measured. As the temperature rose the E.M.F. gen 

 rally varied in an irregular way, rising at times more quickly thi 

 would be right, but as the temperature fell the E.M.F. usually f 

 pretty steadily, and the values deduced from the fall are those givei 

 they were all repeated, and the value given is what appears b 

 The value 12-1 for the last concentration was very steady. 



After these experiments the solution stood in a stoppered bo 

 and some bright blue crystals separated out of the liquid. 



