RESPIRATORY METABOLISM IN INFANCY AND IN CHILDHOOD

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Abstract
Although the temperature regulation of adults has been carefully studied, no comprehensive simultaneous measurements of heat production and heat loss have been made for premature infants. Since one evidence of the functional immaturity of premature infants is their inability to prevent large fluctuations in body temperature, it should be both interesting and important to measure accurately the various factors involved in temperature control. What, if any, is the part played on the one hand by structural peculiarities such as large surface area and thin subcutaneous fat, and on the other by physiologic inadequacies of circulation, sweating or nervous regulatory control? In studying this subject the first problem was the accurate measurement of heat loss, and for this purpose it became necessary to construct a direct calorimeter. Because this calorimeter differs from other previously reported direct calorimeters, is simple and cheap to construct, and is accurate and easy to operate, its

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