( 111 ) 



Prom this table it follows: 



1. That the volume of the net-work varies between 56.7 and 

 53.7 pCt. of the whole cell-volume. 



2. That, where a solution of NaCl of 0.5 pCt. is employed, a 

 solution which with horseblood causes colouring-matter to issue from 

 a portion of the red corpuscles, the figure for the net-work is found 

 to be greater than where solutions of 0.7 and 1.5 are applied. 



What applies to NaCl 0.5, appears to be in a still greater measure 

 the case, when a NaCl-solution of 0.25 pCt. is employed. In the 

 table the numbers bearing on this are indicated in small ciphers. 



This result may be thus explained : 



By a very weak salt solution the volume of the intra-cellular 

 fluid increases so considerably that, in consequence of the great 

 tension, the proto])lasm becomes permeable and allows the contents 

 to pass through it. Consequently the expansion cannot be so conside- 

 rable as according to the calculation a NaCl-solution of 0.5 or 0.25 

 would have to produce, and the equation must, therefore, yield too 

 great a p. According to this view of the matter there is a perfecit 

 agreement with what we observe in the red corpuscles ; there the 

 issue of the fluid contents of the cell is rendered visible by means 

 of free haemoglobin. 



As to the way in which protoplasma and intra-cellular fluid are 

 arranged in the white corpuscles, we do not learn much from the 

 experiments communicated. We may indeed explain the phenomena 

 by considering the cell to consist of a protoplasmic net of closed 

 meshes; but we may also imagine it to be built up of a closed husk, 

 within which is a fluid divided among protoplasmic strands, which 

 do not form closed meshes. In the latter case, however, we must 

 take it for granted that the external husk is only permeable to water 

 (cf. note on page lOG). 



In order now to make a choice between the two hypotheses, I 

 measured off two equal quantities of white corpuscles, and for an 

 hour vigorously shook one quantity with a large (number) of sharp 

 pieces of glass. By this means a considerable quantity of white 

 corpuscles were bruised and torn. 



When now equal portions of the bruised and not-bruised white 

 corpuscles were treated with different salt solutions, the conti'action 

 and expansion appeared for both sorts caeteris paribus almost 

 the same. 



The result obtained, as far as I can see, is not to be otherwise 

 explained than by taking it for granted, that every average part of 

 the white corpuscle, again of itself, consists of a closed net of meshes. 



