88 



The following Table exhibits the osmose of substances of all 

 classes : 



Osmose of 1 per cent, solutions in Membrane. 



Degrees. 



Chloride of zinc 54 



Chloride of nickel 88 



Nitrate of lead 125 to 211 



Nitrate of cadmium 137 



Nitrate of uranium 234 to 458 



Nitrate of copper 204 



Chloride of copper 351 



Protochloride of tin 289 



Protochloride of iron 435 



Chloride of mercury 121 



Protonitrate of mercury... 356 



Pernitrate of mercury 476 



Acetate of sesquioxide of 



iron 194 



Acetate of alumina 280 to 393 



Chloride of aluminium ... 540 



Phosphate of soda 311 



Carbonate of potash 439 



The osmotic action of carbonate of potash and other alkaline salts 

 is interfered with in an extraordinary manner by the presence of 

 chloride of sodium, being reduced almost to nothing by an equal 

 proportion of that salt. The moderate positive osmose of sulphate 

 of potash is converted into a very sensible negative osmose by the 

 presence of the merest trace of a strong acid, while the positive 

 osmose of the first-mentioned salt is singularly promoted by a small 

 proportion of an alkaline carbonate. The last statement is illustrated 

 by the following observations : 



Osmose in same membrane. 



Degrees. 

 1 per cent, sulphate of potash 21 



Same +0'1 per c. carb. potash . . 254 



Same + Same 264 



O'l per cent, carbonate of potash alone . , 92 



Same .... 95 



