COBALT CHLORIDE AND CALCIUM BROMIDE. 



201 



2.272, 2.650, 3.143, 3.313, 3.597. 3.938, 4.260. The first six increments of 

 concentration were each 0.189, the next four separately equaled 0.379, and 

 the remainder had the values 0.493, 0.170, 0.284, 0.341, and 0.322. The 

 concentration of the mother-solution of calcium bromide was 4.733. The 



0.13 



0.12 



O.ll 



0.10 



0.09 



0.08 



O.07 

 >% 



-4-) 



.> 0.06 

 O 



-O 



C 0.05 



O 

 O 



O.04 



O.03 



< 

 0.02 



O.OI 



CoCI 2 * CaCI 2 



O.5 1.0 1.5 2.0 2.5 



Concentration 

 FIG. 72. 



3.0 



3.5 



4.0 



solutions containing calcium bromide had colors similar to the solutions in 

 which calcium chloride was present, namely, all shades from red to intense 

 blue. The photographic strips succeed one another from the side of the 

 spectrogram adjacent to the numbered scale, to the edge adjoining the spark 

 spectrum, in the order of increasing concentration of calcium bromide. 



