The Structure of Colored Blood- Corp uncles. 303 



least two components, one (paraglobnlin) precipitable by C0 2 , 

 and removable by the action of weak NH 3 ; the other pellucid 

 and not granulated by acids."' 



A residuary stroma, such as Lankester here speaks of, seems 

 to have been first recognized by Nasse, who said 1 that the red 

 blood-corpuscle "consists of a basis tissue, insoluble in water, 

 which is penetrated by a red substance, probably dissolved, or 

 at least in water easily soluble (the red coloring matter of the 

 blood), and some water, and within which there is an aggrega- 

 tion of solid granules not connected with the coloring matter." 

 Iiollett, 2 also, assumed that a stroma or matrix enters into the 

 structure of the colored elastic extensible substance of the red 

 blood-corpuscle, to which the form and the peculiar physical 

 properties of the corpuscle are due. This stroma is, however, 

 according to Bbttclier, an artificial product, "nothing more 

 than a residue of the colorless part of the red blood-corpuscles, 

 varying much in form and extent, which remains after the dis- 

 solution of the original structural relations." 3 Briicke con- 

 sidered the most probable interpretation of the forms of colored 

 blood-corpuscles, based on their appearances after the addition 

 of boracic acid, to be the existence of a porous mass of motion- 

 less, very soft, colorless, hyaline substance, which he calls 

 oecoid, in the interspaces of which is imbedded the living body 

 of the corpuscle ; which body he calls zooid, and which consists 

 of the nucleus (where that exists) and all the remaining part 

 of the corpuscle containing the haemoglobin. 4 But Rollett in- 

 sisted that the forms on which Briicke based this interpretation 

 are products of decomposition. 5 Strieker agrees with Briicke 

 as to the existence of the oecoid, but separates, in oviparous 



(1) "Blut." R. Wagner's Handworterbuch der Physiologie. Braunschweig, 1842, vol. I, 

 p. 89. 



(2) " Versuche und Beobachtungen am Blute." Moleschott's Untersuchungen. IX; also, 

 Sitzungsberichte der Wiener Akademie, vol. 46, Div. }l (1862), pp. 65—98; and Strieker's 

 Handbuch, cit. Leipzig Edition, 1869, p. 295 ; American, p. 284. 



(3) Op. cit., Archiv f. Mikrosk. Anatomie, p. 90, translated in Quarterly Journal of Micros- 

 copical Science, October, 1877, p. 390. 



(4) Ueber den Bau der rothen Blutkorper ;'' Sitzungsberichte der Wiener Akademie, vol 

 56. Div. II (1867), p. 79. 



(5) "Ueber Zersetzungsbilder der rothen Blutkorperchen ;" Untersuchungen aus dem In- 

 stitute der Physiologie und Histologie in Graz. Leipzig, 1870, p. 1. 



