of Organic Bodies. 277 



Chloride of sodium 5703 



Chloride of potassium 8*99 



Tribasic phosphate of soda .... 2*90 



Tribasic phosphate of potash . . . 4'53 



Bibasic phosphate of potash .... 4*65 



Tribasic phosphate of lime .... 2*57 



Tribasic phosphate of magnesia . . 2*57 



Bibasic phosphate of magnesia . . . 037 



Sulphate of potash 5*33 



Sulphate of lime 027 



Magnesia, peroxide of iron, and silica 0*79 



100-00 



These inorganic constituents must not be compared with 

 those existing in the urine before carbonization. In the latter 

 the bases are partly combined with organic acids, which are 

 converted into carbonates during the process of carbonization, 

 the carbonic acid of which is expelled by the phosphoric acid 

 of the bibasic phosphates. Thus tribasic phosphates are 

 formed, which cannot exist as such in the urine, because the 

 latter exerts an acid reaction. 



During the four days in which the faeces and urine were 

 collected, the inorganic constituents of the former amounted 

 to 10'4;22 grms., and the latter to 59'585. This remarkable 

 result would not have been expected a priori. The difference 

 becomes still more striking when the amount of the sand is 

 deducted from the inorganic constituents of the faeces, and 

 which can only be regarded as an accidental mixture. 



The following comparison exhibits the inorganic compo- 

 nents of the faeces and urine excreted in a day, excluding the 



sand : — 



Urine. Faeces. 



Chloride of sodium 8-9243 grms. 0'0167 grms. 



Chloride of potassium 0'7511 ... 



Soda 00185 ... 



Potash 2-4823 ... 0-5'i-55 ... 



Lime 0*2245 ... 05566 ... 



Magnesia .... 0-2415 ... 02781 ... 



Peroxide of iron . . 00048 ... 0544 ... 



Phosphoric acid . . 1-7598 ... 0*8072 ... 



Sulphuric acid . . 0*3864 ... 00293 ... 



Silica 0-0691 ... 0-0375 ... 



14-8438 2-3438 



Hence the amount of inorganic constituents in the urine is 

 more than Q^ times greater than that in the solid excrements. 



