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The stature, bone cortical area, percentage of cortical area, and length of the second metacarpal of 80 Peruvian Quechua boys from Vicos show a significant reduction when compared with their Quechua counterparts from Nuñoa. The causes of these differences are not clear.

LITTLE PLAYS FOR LITTLE PLAYERS. Edited by Sylvia E. Kemerman. Boston: Plays, Inc., 1952; pp. x + 325. $2.75.THE DRAMATIC USE OF ORAL INTERPRETATION AND CHORAL SPEAKING. Herbert Adrian Rehner. Chicago: Bruce-Howard Publishing House, 1951; pp. 90. $2.00.HOLIDAY PLAYS FOR TEEN-AGERS. Helen Louise Miller. Boston: Plays, Inc., 1952; pp. 375.SHOWMANSHIP IN PUBLIC SPEAKING. Edward J. Hegarty. New York: McGraw-Hill Book Company, 1952; pp. x + 236. $3.75.DISCUSSION AND DEBATE. By William A. Behl. New York: The Ronald Press Company, 1953; pp. vi + 365. $4.00.Bruce Smith, Harold Lasswell, and Ralph D. Casey, Propaganda, Communication and Public Opinion (Princeton, New Jersey, 1946), 95.

This paper presents a quantitative description of the volume required to use common hand tools. The volume described, termed the “space envelope”, is for the tool using hand of right-handed subjects. The data were collected on six individuals who had hands at or above the 95th percentile of the military population in length and breadth. The data were obtained by use of a photographic process employing time exposures for each action. This technique provided data comparable to that provided by movie techniques but at a lower cost. The implications of the data for maintenance requirements are also discussed.

Several letters to the editor are presented in response to articles in previous issues, including one about the Boston Symphony in the December 19, 1949 issue, another on the campaign by the American Medical Association (AMA) to defeat socialized medicine in the same issue, and "Science & Breeding Atoms," in the December 12, 1949 issue.