Abstract
This paper presents evidence, in the form of significant percentage differences, that clasping the hands with the left thumb outside points to latent sinistral tendencies in the case of man. Some curious discrepancies occur in the results for the sexes, the causes of which are obscure. In presenting the material with reference to the thumb outside in clasping the hands, attention is called to 3 different types of righthandedness and 3 of lefthanded-ness which give different percentages with reference to the dominant thumb, some of which are significant. The general approach is similar to that of Lutz but somewhat different conclusions are reached.

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