155] 



TEE GOLDFISH AS A TEST ANIMAL— POWERS 



35 



TOXICITY OF CUPRIC CHXORIDE, CADMIUM CHLORIDE, FERRIC CHLORIDE, 

 COLLOIDAL COPPER, AND DISTILLED WATER 



It has already been pointed out that the toxic activity of various concen- 

 trations of CuClz, CdCk and FeCls did not follow the same general law as did 

 all other substances tested. The toxicity of the CuCl2 at very high concen- 



TABLE XXV 



Ctjpric Chloride. Temperatuee 21''C. 



