OF COPPKII. 388 



first tasteless, but it left a slightly sweetish im- 

 pression, which was followed by a feeling of bit- 

 terness. It w r as not absolutely insoluble in wa- 

 ter : for the water used for washing it always 

 came through slightly coloured, though I con- 

 tinued to wash it for several days. It does not 

 affect vegetable blues. 13-9 grains of this pow- 

 der when exposed to a red heat lost 2-4 grains of 

 its weight ; hence, its constituents are 



1 atom chromic acid 6-5 



1 atom oxide of copper 5 

 % atoms water 2-25 



13-75 



7. Acetate of copper. This salt has a fine Acetate, 

 green colour, and crystallizes in large octahe- 

 drons with a rhomboidal base. Mr. R. Phillips 

 found that 100 parts of this salt contain 39'5 of 

 oxide of copper. And Berzelius' experiment; 

 when properly corrected, exactly agrees with this 

 statement.* Hence, the constituents of the salt 

 must be 



Acetic acid 4-9-375 or 6'25 



Oxide of copper 39 '5 .- 5 

 Water . 11-125 - 1-408 



100 



1*408 exceeds 1 atom of water by 0'283, or 



Annals of Philosophy, (second series) VIII. 192. 



