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S. A. WHITE, M.D.; P. F. McGUIRE, M.D.
Arch Intern Med (Chic). 1925;36(3):355-365. doi:10.1001/archinte.1925.00120150064003.
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This study of the vital capacity of a number of students at an army summer training camp, the Citizens' Military Training Camp held at Camp Meade, Md., July, 1924, was planned with a threefold purpose:

1. To obtain accurate vital capacity estimations on a relatively large and homogeneous group of individuals. The need of further observations as an aid in arriving at some standard by which we might judge all individuals of a given class is certainly great; and the army, with its large and well organized summer training camps, offers a peculiarly good opportunity for studies of value in meeting this need.

2. To determine whether or not the improvement in general physical condition resulting from the training undergone is accompanied by a corresponding change (increase) in the vital capacity. This general physical improvement is abundantly evidenced by all other criteria at our disposal, and is scarcely subject to


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