Muscular and Pulmonary Tissues. 



447 



flour was carefully incinerated, and the phosphoric acid and 

 potash were determined in the ash. A correction had to be 

 introduced in the analysis by diffusion, owing to the colloid 

 mass still holding a proportion of diffusible phosphoric acid and 

 potash, depending on the relation existing between the volumes of 

 fluid in and out of the dialyzer. Thus, if the volume of the 

 outside solution was eight times that of the contents of the dia- 

 lyzer, one eighth of the phosphoric acid found outside the dia- 

 lyzer would have to be subtracted from the phosphoric acid found 

 in the dialyzer in order to obtain the correct proportion of col- 

 loid phosphoric acid. The following Table shows the result of 

 these analyses : — 



Phosphoric Acid and Potash, total and colloid, in Flour, Potato, 

 and Rice, in 100 grms. 



Total phosphoric acid. 



Colloid phosphoric acid. 



Total 

 potash. 



Colloid potash. 



Flour 0-3142 



0-2062 found 

 00581 

 00698 

 0-1144 „ 



0-1797 

 0-5801 

 0-678 

 00856 



0-0557 found 

 0-2175 „ 

 0-263 „ 



0-2828 „ 



Potato No. I. ... 0-0911 

 Potato No. li. ... 0-111 

 Rice 0-2020 



Proportions. 



Flour 



Total. Colloid. 



1 to 0-60 i ^^^^^^^^d 

 [ per volume 



1 to 0-58 



1 to 0-54 



1 to 0-50 



1 to 0-55 



Total. Colloid. 



1 1 to 0-21 /^^••'•^^^^^l 

 J !_ per volume. 



1 to 0-28 



1 to 0-24 



1 to 0-22 



1 to 0-24 



fNo. I 



p<"="° {no.ii. ; 



Rice 



jVlean . . 







- - 



i^oim^ means determined in the colloid fluid, the result is calculated for 100 

 grms. of substance analyzed, and is not corrected per volume. Corrected per 

 volume means after deduction of the amount of diffusible phosphoric acid or pot- 

 ash contained in the colloid fluid. 



It must be recollected that in an inquiry of this kind it would 

 be next to impossible to obtain figures agreeing perfectly with 

 each other. Indeed physiological processes do not appear to 

 admit of numerical results being always identically the same 

 in all similar cases. 



If we inquire into the total amount of phosphoric acid and 

 potash found for the different articles of vegetable food analyzed, 

 we shall observe it, especially that of the ])otash, to differ so 

 widely in flour, potato, and rice that no resemblance can be 

 traced between these vegetables on that score. Notw^ith standing 

 this fact, the proportion of colloid ])hosphoric acid and colloid 

 potash to the total phosphoric acid and total potash remains 



