in Agriculture. 



185 



possessing a comparatively equal solubility with chloride of 

 sodium, cannot be supposed to vary much ; and the true com- 

 position of the salts contained in the solutions employed, as given 

 below, will be seen to present a very close coincidence between 

 the per-centage of lime-salt and of ammonia absorbed. 



Real composition of the salts dissolved for the absorption 

 experiments, calculated to 100 parts. 



We ought, then, to have an index to the absorbing power of 

 a salt by a knowledge of the quantities of chloride of sodium 

 and of soluble lime-salt which it contains ; an equivalent of lime- 

 salt fixing an equivalent of ammonia, — and the chloride of sodium, 

 the per-centage which it has been above shown to absorb. Let 

 us now apply this method of determination to the samples under 

 experiment. 



No. I. 



Total number of grains of ammonia absorbed^ 

 by 100 grains of salt J 



Deduct the absorbing power of 1-356 grain of 

 sulphate of lime 



} 



Deduct the absorbing power of 94-835 grains"! 

 of chloride of sodium J 



No. II. 

 Total number of grains of ammonia absorbed^ 



by 100 grains of salt J 



Deduct the absorbing power of 1'039 grain of°\ 



sulphate of lime j 



Deduct the absorbing power of 97"737 grains! 

 of chloride of sodium ...... J 



•6309 



•5187 



•1122 

 •1000 



•0122 



•5005 



•3973 



•1032 

 •1041 



Phil. May. S. 4. Vol. 10. No. 65. Sept. 1855. 







