Outlines of human physiology . ry exactly Wmr of an are flexible, and when rolling upon their edgesare often bent in such a manner that they appear toconsist of a central nucleus projecting from a thindisc. Their specific gravity Dr. Davy estimates atabout 1087. The adjoined figure repre-sents six squares of a glassmicrometer, each side of asquare being -g-j-o- of an the squares marked 1,2, and 3, different appear-ances of the particles ofhuman blood are delineated,showing their diameter, theircentral depression, and va-rious positions in which they may be seen when rollingdo
Outlines of human physiology . ry exactly Wmr of an are flexible, and when rolling upon their edgesare often bent in such a manner that they appear toconsist of a central nucleus projecting from a thindisc. Their specific gravity Dr. Davy estimates atabout 1087. The adjoined figure repre-sents six squares of a glassmicrometer, each side of asquare being -g-j-o- of an the squares marked 1,2, and 3, different appear-ances of the particles ofhuman blood are delineated,showing their diameter, theircentral depression, and va-rious positions in which they may be seen when rollingdown an inclined surface. I made this drawing veryrecently from particles of the blood seen in a micro-scope, made by Dollond, having two achromatic objectglasses. The true shape of these bodies was, I believe,discovered by Dr. Young, who describes it in an essaypublished in his Medical Literature. Figs. 4, 5, 6, repre-sent the particles of the blood of a skate : they appearto differ from the particles of human blood principally. Of the Coagulation of the Blood. 29 in being of a much larger size, in their oval outline,and in the oval figure of their central depression. When immersed in w^ater the particles of the bloodlose their colouring matter, and with it much of theirspecific gravity, so that they float; their diameterlikewise becomes reduced by one-third, and their figurebecomes spherical. Mr. Brande discovered, that the colouring matterof the blood is an animal substance of a peculiarnature, susceptible, like the colouring matter fromvegetables, of uniting with bases, and applicable tothe art of dyeing. The most effectual mordaunts forthe colouring matter of the blood are salts of mercury,especially the nitrate and corrosive sublimate. Mr. Brande ascertained that iron does not exist ingreater proportion in one element of the blood than inanother. The coagulation of the blood and its separation intoserum and crassamentum are phenomena, which mayequally be regarded as the res
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Keywords: ., bookcentury1800, bookidoutlinesofhumanp00, booksubjectphysiology
