Abstract
The surface areas of the chief regions of the body were determined for 12 fetuses ranging from 3.27 to 47.22 cm. in total or crown heel length and from 1.26 to 2463.0 gm. in weight. The details of the material and method employed are described in a preceding paper.The regions delimitated were head, neck and trunk (including the perineal region and the penis and scrotum in the males), the upper extremities (both sides), and the lower extremities (both sides including gluteal regions). From geometrical considerations, that were found to be applicable to measurements of the surface area of the body as a whole, it was thought that an adequate expression for representing the relation of the surface area of a part to body length might be:Sp = aLb, or, log Sp = log a + log L·b where Sp is the area of the part in question, L is the total or crown heel length of the body and b is an exponent approaching 2. Graphic tests on double logarithmic paper indicated that this surmise was justified.When fitted by the method...
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