the Optical Rotation of the Proteins of Blood Sera. 185 



One of the most striking features of the work is the discovery that 

 pseudo-globulin has probably identically, certainly almost identically, the 

 same form of absorption band of the same magnitude, whether it is of horse 

 or human origin. This is good evidence of pseudo-globulin being a chemical 

 entity. 



Table III. — Eu-Globulin from the Horse. 





Extinction coefficient. 



Wave-length. 





Specimen 

 number. 













Specific 

 rotation. 



Of head 

 at 2800. 



Of foot 

 at 2500. 



Difference 

 or amplitude. 



Head. 



Foot. 



193 

 194 

 197 

 198 

 199 

 203 



1-68 



0-48 

 0-53 



1 -20 



2800 



2530 

 2515 



o 



1-44 

 1-09 

 1 '42 



0-62 

 0-62 

 0-89 



0-82 

 0-47 

 0-53 



2760 

 2770 

 2780 



2530 

 2530 

 2535 



-40-98 

 -43-03 

 -43 -04 



Adopted 



1-42 



0-89 



-53 



2775 



2532 



-43 



Table IV. — Eu-Globulin — Human. 



Specimen 

 number. 



Extinction coefficient. 



Wave-length. 



Specific 

 rotation. 



Of head 

 at 2800. 



Of foot 

 at 2500. 



Difference 

 or amplitude. 



Head. 



Foot. 



200 ascitic fluid 



1 -37 



0-71 



0-66 



2750 



2630 



o 



-50 -24 



201 „ „ 



1 -46 



0-78 



0-68 



2770 



2510 



-49 -12 



202 „ „ 



1 -39. 



0-67 



0-72 



2800 



2540 



-47 13 



204 „ 



1 -53 



0-85 



0-68 



2805 



2525 





205 normal serum 



1-52 



"89 



0-63 



2790 



2530 



-47-89 



Adopted 



1 51 



85 



0-66 



2795 



2530 



-48 



Observations on the Figures for Eu-globulin, Tables III and IV. 



The curves for the two eu-globulins are so similar in their general form 

 and magnitude to those for pseudo-globulin as to leave no doubt of a close 

 chemical relationship between the two groups, but the minor quantitative 

 distinctions are too great and too well-defined to allow of their being 

 regarded as mere varieties of the same substance. 



At the present time, it is a matter of great interest to discover any funda- 

 mental differences between pseudo-globulin and eu-globulin. Dr. Harriette 



VOL. XCIII. — B. P 



