Microscopical morphology of the animal body in health and disease / by C. Heitzmann. With 380 original engravings.
- Carl Heitzmann
- Date:
- 1883
Licence: Public Domain Mark
Credit: Microscopical morphology of the animal body in health and disease / by C. Heitzmann. With 380 original engravings. Source: Wellcome Collection.
Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.
101/884 page 75
![STliVCTriiK OF COLoni:!) HLOOD-COIU'ISCLP^S. 17) mum measurcmiMit recorded in his table \h .004;) mm., and the maxitiium, thoufrh not in tlie same specimen, .()0<,»7 mm. He remarks : I have always, both in animals and in man, fonnd tlie transverse diameter of the blood- corpuscles of one and the same individual vary from one-fourth to one-half of the mean nu>asurement; and it api)ears that all the sizes lyinjj ])etween the two extremes are i)resent in toleral)ly ecjual numbers, with the exception of the smallest corpuscles, which occur ft)r the most ])art sinj^ly and at intervals.* Max Schultze distin-fuished in liis own and other persons'healthy blood two forms of colored corpuscles, viz.: globidar aiul disk-like ; the globular, few in number, vary from .005 to .00() mm. in size ; and from these there are ^&A- ual transitions to the ordinary disks, which measure from .OOSto .(»!(» mm. t The snuiUest colored corpuscles wliich Klebs reported t having toimd in his own blood varied from .OOTiS to .OOOti mm. ; but in blood fi'ora the corpse of a leucivmic child he observed a few as small as .00-411) mm. Woodward said : The trutli is that not only do the individual 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 corpuscles (;)() to 17.5, still more in the case of but 10 to 50, as usually practiced), varies considerably, not only betsveen different individuals, but also between different parts of the very same drop of blood. Both the maxi- mum and the minimum which he found—\'iz.: the 39G millionths and the 210 millionths of an inch, or .01005 and .00548 mm.— were present in the same field of one droj).!}! Berchon and Perrier|| state that the colored blood-corpuscles of the foetus and the newly born are on an average smaller than those of adults. The extremes given are: minimum, .0031 to .0002 mm., and maximum, .0091 to .0093 mm.; but they do not mention that the extremes occun'ed in one and the same case. More recently, PeiTier If measured blood-corpuscles of thu-ty-five intUviduals of different ages, and found that those of .010 mm. were very frequent in the first days after birth, w-hile later they occiirred much more rarely. After the first year, blood-corpuscles meas- uring .0093 mm. were rarely present in gi-eater proportion than ten in a hun- di-ed; and in adults often absent. Such of .0043 mm. occurred most often in the aged and in childi-en. The diameter of the gi-eat mass at every age varies from .0050 to .0087 mm. ; within these limits those of .0075 mm. are most frequent and never absent. The form of the smaller is more or less globular; the larger are flattened. * Cited bj' Woodward, On tlie Similarity between the Red Blood-conniscles of Man and thoae of certain other Animals, especially the Dog: considered in connection with the diajnio- sis of Blood-stains in criminal cases. American Journal of Medical 6'Cit'nces, Jan., 1875. Monthly Microscopical Journal, Feb. 1, 1875, p. G9. t Eiu heitzbarer Objecttisch iind seine Verwendung bei Untersuchungen des Blutes. Archiv fiir Mikroskopisclie Anatomic, vol. i. (1805), p. 35. i L'eber die Kerne iind Scheinkerue der rotlien Blutkorperchen der Saugethiere.' Virchctw's Archiv fiir pathologische Anatomic und Physiologie und fiir Klinische Medicin: vol. xxxviii. (18()7), p. 105. i The Application of Photographj' to Micrometry, with special reference to the micro- metry of blood in criminal cases. Transactions of the American MeiUcal' Association, vol. xxvii. (1876), p. 303-315. II Note sur les globules du sang chez le foetus. Bordeaux Medical., p. 123 and 237; Canstadt's Jahresbericht for 1875, I., p. 46. ^ Sur les variations liu diam^tre des globules rouges du sang dansl'espece humaine, au point de vue de resperti.-*e legale. Conipt. Rendus, tom. 84 (1877), No. '24, p. 1404.](https://iiif.wellcomecollection.org/image/b21219163_0101.jp2/full/800%2C/0/default.jpg)
