856 
Proceedings of the Boyal Society 
B. After Loss of Blood . — Time taken for recovery : — 
Hunerfauth, .... 19-23 days. 
Lyon, ..... 19-25 „ 
After subsequent injection of 
(a) Saline Solution : — 
Yon Ott, 16-24 days. 
(b) Serum : — 
Yon Ott, 17-24 days. 
C. After Loss of Blood and Subsequent Transfusion of Blood . — 
Time taken for destruction of transfused corpuscles : — 
Yon Ott, ..... 19-22 days. 
and for subsequent recovery — 
Yon Ott, .... 2-3 weeks. 
The evidence thus obtained in so many different ways all agrees 
in pointing to a period of some three or four weeks as being the 
longest duration of life of transfused blood corpuscles. 
It has alreadybeen seen that the probabilities are all in favour 
of this life-duration being shorter, rather than longer, than that of 
the normal red blood corpuscles, so much so at least as to justify 
the assumption, that this period of time represents approximately 
the average duration of the life of red blood corpuscles in the 
rabbit, the dog, and presumably also in man. 
Monday, 5th July 1886. 
The Hon. LOED MACLABEN, Yice-President, 
in the Chair. 
The following Communications were read : — 
1. The Electric Eesistance of Nickel at High Temperatures. 
By Professor C. G. Knott. 
2. Effect of External Forces on a System of Colliding Spheres. 
By Professor Tait. 
