THE RELATION OF RED CELL DIAMETER AND NUMBER TO THE LIGHT TRANSMISSION OF SUSPENSIONS

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Abstract
The no. of red cells in a suspension can be approximately found by measuring the amt. of light transmitted through it, but the fact that the opacity depends on factors other than cell no. (e.g. cell area, shape, and refractive index differences between the cells and the medium), makes the method greatly inferior to that of direct counting. For a similar reason, it is not possible to use opacimetric methods for the determination of red cell diam., area, etc.