1917] Forbes: Irrigation Effects of Copper Compounds Upon Crops 403 



TABLE I 



Solubilities of Copper Compounds 



Compound 

 Malachite 

 CuCO,.Cu(OH), 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Precipitated basic 

 copper carbonate 



Copper sulphide; 



CuS 

 Chalcopyrite 

 CuFeS, 



Chalcopyrite 

 CuFeS, 



Malachite 



Chrvsocolla 

 Cu Si O^.n H,0 



Cupric sulphide 



CuS 

 Cuprite 



Cu„0 

 Cupric oxide 

 CuO 



Solvent 



Water containing 0.12% 

 carbon dioxide 



Cu dissolved 



parts per 



million 



Pure water 



Water containing 0.12% 

 carbon dioxide 



Water containing 0.13% 

 carbon dioxide and 

 0.01% sodium chloride 



Water containing 0.13% 

 carbon dioxide and 

 1.0% sodium chloride 



Water containing 0.12% 

 carbon dioxide and 

 0.01% sodium sulphate 



Water containing 0.12% 

 carbon dioxide and 

 1.0% sodium sulphate 



Water containing 0.12% 

 carbon dioxide and 

 0.01% sod. carbonate 



Water containing 0.12% 

 carbon dioxide and 

 1.0% sod. carbonate 



Water containing 0.12% 

 carbon dioxide and 

 0.2% calcium sulphate 



Water containing 0.12% 

 carbon dioxide and 

 0.11% calc. carbonate 



Oxygen-free water 



Reference 



E. E. Free, Journ. 



29.0-31.0 Am. Chem. Soc, 



XXX, 9, p. 1367 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1370 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1370 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1371 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1371 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



E. E. Free, Journ. 

 Am. Chem. Soc, 

 XXX, 9, p. 1372 



W. H. Eoss, MSS 



1.5 



34.8 



36.0 



58.0 



37.0 



58.0 



10.0 



0.7 



36.0 



1.4 

 0.09 



Pure water 



Sodic sulphide 



measurable 

 amounts 



Amt. not 

 stated 



"Insoluble in water, slightly 

 soluble in water charged 

 with carbon dioxide. ' ' 



"Somewhat soluble in water 

 with carbon dioxide ' ' 



Water 1 to 950,000 



"Insoluble in water" 



"Insoluble in water" 



IT. S. Geol. Survey 



Monogra[)h 



XL VII, p. 1107 

 TJ. S. Geol. Survey 



Monograph 



XLVn, p. 1106 

 Moissan 5, p. 167 



Lindgren, IT. S. 

 u. S. Prof, paper 

 43, p. 188 



Comev, Diet. Solu- 

 bilities, p. 139 



Comey, Diet. Solu- 

 bilities, p. 137 



Comey, Diet. Solu- 

 bilities, p. 137 



