Salts of Copfer^ Cobalt, and Nickel, with respect to Atmospheric Moisture. 



315 



OBSERVATIONS ON HYGEOSCOPIC AND DELIQUESCENT SALTS. 



Column I. — Date of observation. 



„ II. — Tension of aqueous vapour in inches of mercury. 

 „ III. — Mean temperature of twenty-four hours. 



W, weight of salt taken. 



W, increase of weight per 100 parts of salt. 



2X2 



