76 BIOLOGY. [Book n, 



Sulphui-io Acid 69,32 



Sugar Candy 26,74 



Barley Sugar 26,21 



Molasses of Cane Sugar 32,55 



Sugar of Starch 25,94 



Gum Arabic 13,24 



Albumine 3,08 



Furthermore, these colloids, so slow to blend and to be diffused 

 are easily penetrated by the crystalloids, while their analogues 

 cannot traverse them except by taking, through isomeric modifica' 

 tion, an altogether special state of solubility. For instance, w( 

 shall see when speaking of animal digestion that the albuminoida! 

 substances of the elements, in order to pass into the circulator] 

 system, need previously to-be transformed into soluble albuminose 



We must also- remember that two substances, incapable o'. 

 chemical combination, and possessing different degrees o: 

 diffusibility, separate to a certain point, when they are put ii 

 a blended state, in a diffusion vessel, for then the more diffusibh 

 of the two passes out more rapidly than the other. 



The application of the preceding data to nutrition is achievet 

 almost of itself, so to speak. In effect, from the simply physica 

 point of view, organised beings are merely masses of colloida 

 substances, holding in solution crystalloidal substances. Thi; 

 definition is strictly true for a number of rudimentary organisms 

 for instance the amoebse and most of the infusoria ; in general 

 for all those beings, neither vegetal nor animal, of which- Haecke 

 has made his group "of monera. li applies even to a number o 

 zoophytes, and also to every histological element of the superio 

 organisms, isolatedly considered. Let us take the small amorphou 

 mass of contractile albuminoid substance which constitutes ai 

 amceba, a rhizopod, or monocellular beings such as the Protococcu 

 nivalis, many infusoria, lastly the globules of the blood of th 

 mammifers, and even the cells a,nd fibres, grouped into tissues t 

 form the body of plants and of the superior animals ; we se 



