. The Viscosity of the Blood. «.ir.»].«m»r,i™ -r™-r. ^^ °\°yV / s / & •Oi •02 •05 06 *°3 04 Viscosity Coefficients Fig. 5.—Curves showing Effect of Corpuscles on Viscosity with different amounts ofPotassium Oxalate present. Temp. = 35° C. (Cf. Table I.) 342 Dr. A. du Pre Denning and Mr. J. H. Watson. [May 7, Except for the different percentages of added anticoagulator, the blood wasthe same in each case. Inasmuch as the curves are not straight lines, it is evident that theviscosity is not directly proportional to the increase of corpuscles, but ratherthat the former may increase very much m
. The Viscosity of the Blood. «.ir.»].«m»r,i™ -r™-r. ^^ °\°yV / s / & •Oi •02 •05 06 *°3 04 Viscosity Coefficients Fig. 5.—Curves showing Effect of Corpuscles on Viscosity with different amounts ofPotassium Oxalate present. Temp. = 35° C. (Cf. Table I.) 342 Dr. A. du Pre Denning and Mr. J. H. Watson. [May 7, Except for the different percentages of added anticoagulator, the blood wasthe same in each case. Inasmuch as the curves are not straight lines, it is evident that theviscosity is not directly proportional to the increase of corpuscles, but ratherthat the former may increase very much more rapidly than the latter—obviously in the present case more so when Ol per cent, potassium oxalatewas added than when it was 0*3 per cent, potassium oxalate. Similarcurves, although not of the same curvature, were obtained when other experi-mental values were plotted. There are diverse reasons for the dissimilarity,as will be subsequently evident. In fig. 6, on precisely the same scale, are IZ-IO. •oi •02 05 Fig. 6. •03 -04 Viscosity Coefficients -Curves plotted from Table III. Temp. = 35°. recorded results obtained with a different blood, namely, that of a young horse(3 years old), whilst the former was that of an old one (about 18 years old).But, though the same strengths of anticoagulators were again added, it isapparent that the increase in viscosity was here much greater for any givenincrease in the number of corpuscles. Indeed, from the trend of these threecurves it may well be supposed that a blood containing upwards of 20 x 106corpuscles per cubic millimetre would have taken longer to flow throughthe particular viscosimeter tubes used than the same quantity of treaclewould have done. It may further be observed that the differences of theinfluence exerted by each of the three anticoagulators are not so stronglymarked in this set of curves. Such results as the foregoing are obviously in direct contradiction toHurthles view which Professor S
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