154 The Chemistry of Globulin. 



equation (1) and of the laws of A in it, especially that MA/C is proportional 

 to the sum of the squares of the valencies of the ions of the electrolyte. 



In Section 5 the experiments of Hardy on the conductivities of globulin 

 solutions are expressed by formulae which admit of very simple interpreta- 

 tion, and connect these conductivities with those of ordinary electrolytes. 

 At infinite dilution the HC1 compound of globulin is completely dissociated, 

 its conductivity being that due to the completely ionised HC1, the part due 

 to the globulin being then too small to appear, For any other dilution the 

 amounts of combined and free HC1 can be calculated by equations (17) and 

 (18). In the compounds of NaOH and N"H 4 OH with globulin the con- 

 ductivities show that half of the base combines with the globulin in a way 

 which proves it to be an acid, the resulting salt being completely dissociated 

 and showing the conductivity due to Na or NH 4 alone, that of the globulinic 

 acid being too small to appear. The other half of the base which is required 

 to dissolve globulin completely combines with it in a way similar to that of 

 HC1, namely, by addition. 



In Section 6 globulin is shown to have probably a molecular mass 40,000 

 and a basicity 2, the alternative being a mass 60,000 and basicity 3. 

 Further experiments like those of Hardy on the ionic velocity of globulin 

 and also on the coefficient of diffusion of globulin solutions would decide the 

 matter, though doubtless various globulins differ in mass and basicity. A 

 group, C12H20N3O4, related to polypeptides and peptones is shown to be the 

 predominant structure in albumins. The discrepant results of different 

 experimenters on the precipitation of albumin by heavy metals fall into 

 harmony when it is proved that they precipitated different integral 

 numbers of a group such as this in combination with an equivalent of 

 heavy metal. 



