155] 



THE GOLDFISH AS A TEST ANIMAL— POWERS 



35 



TOXICITY OF CUPRIC CHLORIDE, CADinUM CHLORIDE, FERRIC CHLORIDE, 

 COLLOIDAL COPPER, AND DISTILLED WATER 



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

 trations of CuCk, CdCl2 and FeCls did not follow the same general law as did 

 all other substances tested. The toxicity of the CUCI2 at very high concen- 



TABLE XXV 

 CupRic Chloride. Temperature 21°C. 



