Two kinds of egg-shell and lime stone powder with particles of different sizes were used as sources of calcium and we investigated into the relationship between the size of the particles and their nutritive utilization from the experimental view point of calcium retention in bones of albino rats.
As the rates of utilization of calcium were found to be 81.46% (large particle) to 82.26% (small particle), 57.60% (large particle) to 55.06% (small parficle) and 53.01% (large particle) to 53.86% (small particle) in three experiments respectively. It is considered that the size of particle of powder will net influences upon the utilization of Calium.
