The object of publishing the measurements that follow is to present the student with a series of reliable data on the absolute and relative length of the a r m bone in the principal subdivisions of the white race, and on its two main diameters a t the middle of the shaft. Since SuC 's initial contribution on the dimensions of the humerus in 1755, much osteometric work has been done on the bone. Among those prominently associated with such studies were, in chronological order, Humphrey, Rroca, Hamy, Rollot, Bertaux, Manouvrier, Lehmann-Xitsche, Klaatsch, Guldberg, Giuffrida-Ruggeri, 11 ollison, Kurtz, Correa, Rozhdestvcnsky, Vallois, Themida, Wagner ; while many others, including the writer, have contributed in more limited ways on the dimensions of the hone in individual ethnic groups, or 011 its special characters.
With all that, however, there are still wanting sufficiently comprehensive data 011 the main absolute and relative values of the humerus in the principal groups of the white stem, based on well-identified and representative material of both sexes. The records presented here a r e to fill, as far as may be possible, these defects.
The measurements here dcalt with have certain advantages. They were taken on material derived essentiallp from the flood of immigrants into this country during the last decade of the nineteenth century. These newcomers were in general fairly average representatives of their people. They