The writer wishes to express his thanks to Professor H. A. Carr who has generously given his time to criticisms of the experiment.
MAZE PERFOBMANCE OF WHITE RAT
367with each succeeding generation the progeny becomes smaller and less well developed physically, and after two, three or four generations the strain dies out." 2 Any diet which results in a deviation from the optimum is inadequate to that extent. Many degrees of inadequacy are possible simply by the variation of one or more of the substances. It is well known that if there is a reduction or an absence of one or more of the vitamins, detrimental physiological effects will occur.The present experiment is an attempt to relate certain faulty synthetic diets known to have harmful physiological effects, to the maze behavior of practically mature white rats. The following experimental diets were used: Group II. Unfavorable salt Group HI. Unfavorable salt mixmixture ture and vitamin B deficient per cent per cent Casein 20