226 



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TI/B BEGINNINGS OF LIFE. 



"t ■ P V 



granular appearance seemed to become more and more 

 marked as the corpuscles became larger^ and the nucleus 

 also became rrlore and more distinct, though only ap- 

 pearing as a space free from granules. The corpuscles 

 which were about ■2-tW' ^^ diameter, as well as all those 

 that were of smaller size^ presented none of these charac- 

 ters. They were, in fact, not cells but plastides— solid 

 homogeneous bits of protoplasm, exhibiting very slow 



G 



o 



-4 , 



q ^ 



> 



Fig, 1 6. 



Showing the different stages in the development of white blood 

 corpuscles, as seen in blood from a case of Leucocythsmia. All 

 gradational sizes to be seen from a mere homogeneous speck of 

 protoplasm ^ o^" in diameter up to that of a corpuscle of the 

 ordinary size. Those under 30V0" ^^ diameter are homogeneous 

 bits of protoplasm, showing only a very few granules and no 

 nucleus or distinct bounding wall, x 600. 



amoeboid variations in shape ^. There was no break 

 whatever in the continuity of the series- all gradations 

 in size could be 

 plastide particle 



measured 



400 



^ ' in diameter, up to the fully 



developed corpuscle • and until the size above indicated 



/ The amoeboid movements of the white corpuscles, however, are not 

 generally very marked in l)lood taken from Leucocyth^emic patients. 

 They have often seemed to be much less obvious than usual— a large 

 number of the corpuscles remaining for a long time more or less 

 spherical. 



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matter. Wi 



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iciefore appearing 



in size 



ibg 



rew larger and 

 in its earli 



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size; there can 



after the sai 



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' Since le above '— ; 



f ftrent sizes m 

 •■Pretation of the 

 5 4e smaller 



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