The Structure of Colored Blood- Corpuscles. 273 



ioping was completed in 20 minutes ; and in 30 minutes a 

 network was visible in a few roundish corpuscles, surrounded 

 by masses of granular detritus. In addition, a large number 

 of " ghosts " could be seen. Here and there a " ghost " would 

 show a faint network. 



With a saturated solution added undiluted, the network 

 was after one hour visible in some corpuscles, but most of 

 them were destroyed ; of a few left intact, some looked homo- 

 geneous, and some vacuolized. The field was full of faint 

 double - contoured rings, and a large quantity of granular 

 detritus. 



The network structure of colored blood-corpuscles is visible 

 also in anatomical preparations which have been kept for a 

 length of time in Miiller's fluid (Bichromate of potash 100 

 parts, sulphate of soda 50 parts, and water 1000 parts). 



In some of my examinations, especially the earlier, I used 

 the heated stage ; but as the phenomena described were seen 

 at the ordinary temperature of a well-warmed room, I deem 

 it best not to say anything here of variations of temperature. 



I have made some micro-spectroscopic observations of blood, 

 which I shall detail in another connection. 



In this communication I omit the mention, also, of the re- 

 markably varying amount of fibrine threads seen in different 

 preparations of blood ; nor do I enter at length into the 

 question of " detritus formation," or as whatever else one may 

 interpret the appearance in the field of an increasing number 

 of free granules, and granular masses or plaques. 1 On both 

 of these subjects, my Note-book relating to observations ex- 

 tending over two years, contains " minutes." 



In addition to human colored blood-corpuscles, I have ex- 

 amined those of lower animals. Essentially the same intimate 

 structure as that which I have described exists in all. As ex- 



(1) Max Schultze, who saw some of these granules and granular plaques in healthy blood 

 prefers the designation "granule formation," as being non-committal. — Archiv f vr Mikro ' 

 ikopische Anatomie, vol. 1, p. 38. 



