The Structure of Colored Blood Corpuscles. 277 



.0085 Mm. Altogether, the minimum measurement recorded 

 in his table is .0045 Mm., and the maximum, though not in 

 the same specimen, .0097 Mm. He remarks: "I have al- 

 ways, both in animals and in man, found the transverse 

 diameter of the blood-corpuscles of one and the same individual 

 vary from |- to \ of the mean measurement ; and it appears 

 that all the sizes lying between the two extremes are present 

 in tolerably equal numbers, with the exception of the smallest 

 corpuscles, which occur for the most part singly and at inter- 

 vals." 1 



Max Schultze distinguished in his own and other persons' 

 healthy blood two forms of colored corpuscles, viz.: globular 

 and disk-like ; the globular, few in number, vary from .005 to 

 .006 Mm. in size ; and from these there are gradual transi- 

 tions to the ordinary disks, which measure from .008 to .010 

 Mm.? 



The smallest colored corpuscles which Klebs reported 3 

 having found in his own blood, varied from .0058 to .0066 

 Mm.; but in blood from the corpse of a leucsemic child he 

 observed a few as small as .00416 Mm. 



Woodward said: "The truth is that not only do the in- 

 dividual corpuscles in every drop of blood vary considerably 

 in size, but as might be anticipated from this very fact, the 

 average size obtained by measuring a limited number of cor- 

 puscles (50 to 175, still more in the case of but 10 to 50, as 

 usually practiced) varies considerably, not only between dif- 

 ferent individuals, but also between different parts of the 

 very same drop of blood." Both the maximum and the 

 minimum which he found — viz.: the 396 millionths and the 



S (1) Cited by Woodward " On the similarity between the Red Blood-Corpuscles of man 

 and those of certain other animals, especially the dog ; considered in connection with the 

 diagnosis of Bloodstains in criminal cases." American Journal of Medical Sciences, Jan., 

 1875. Monthly Microscopical Journal. February 1, 1875, p.69. 



(2) "Em heitzbarer Objecttisch und seine Verwendung bei Untersuchungen des Blutes." 

 Archiv fur Mikroskopische Anatomie, vol. I. (1865) p. 35. 



(3) "TJeber die Kerne und Scheinkerne der rothen Blutkorperchen der Saugethiere." 

 (Virchow's) Archiv fur pathologische Anatomie and Physiologie und fur KliniacheMedicin; 

 vol. XXXVHI, (1867), p. 195. 



