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A COMPARATIVE STUDY

C. I. REED, PH.D.; ALBERT BACHEM, PH.D.

Am J Dis Child. 1935;50(1):11-27.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

This investigation was undertaken to determine the comparative biologic value of radiations from different kinds of lamps. Since the antirachitic effect of radiation has been more thoroughly studied and more accurately standardized, it was decided to use the rachitic rat as an indicator. Since the total reaction obtained varies somewhat with different rachitogenic diets, it seemed desirable to make simultaneous studies on groups of rats fed different diets. Accordingly, the Steenbock 2965 and the McCollum 3143 rachitogenic diets were selected as the ones probably most widely used.

Six series of experiments are reported. In series 1 only the Steenbock diet was used; in series 2 only the McCollum diet. In all other series duplicate tests were made with each diet.

In some of the experiments the line test was employed as a check on the roentgenographic readings, but it was found that there was generally such close agreement that the . . . [Full Text PDF of this Article]

Author Affiliations
CHICAGO

From the Department of Physiology, College of Medicine, University of Illinois.

Footnotes
The expenses of this investigation were borne in part by grants from the American Association for the Advancement of Science, the American Medical Association, the University of Illinois Graduate School Research Fund and the Phi Rho Sigma medical fraternity.

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