The Carnegie Institution of Washington . tus of the unit type developed in this laboratory, together withother types of apparatus used by leading investigators for studyingrespiratory exchange; several respiration chambers for study of patho-;logical cases, infants, small animals, and groups of individuals orlarge animals; supplementary apparatus for recording muscularactivity, respiration, and pulse-rate; two bicycle ergometers, and twotreadmills for studying muscular work; various types of apparatus NUTRITION LABORATORY. ^5 for photographic registration of pulse rate, respiration, electrical
The Carnegie Institution of Washington . tus of the unit type developed in this laboratory, together withother types of apparatus used by leading investigators for studyingrespiratory exchange; several respiration chambers for study of patho-;logical cases, infants, small animals, and groups of individuals orlarge animals; supplementary apparatus for recording muscularactivity, respiration, and pulse-rate; two bicycle ergometers, and twotreadmills for studying muscular work; various types of apparatus NUTRITION LABORATORY. ^5 for photographic registration of pulse rate, respiration, electricalaction of the heart, and other delicate physiological activities; anadiabatic bomb calorimeter; and a complete equipment for chemicalanalysis of foods and urine. A psychological laboratory has beenfitted up for observations in physiological psychology, particularlywith regard to the influence of various foods and drugs. Much of thescientific equipment has been developed in the Nutrition Laboratoryand constructed in its own machine Interior showing Calorimeters and Accessory Apparatus. The researches during the past eight years have included studiesof the metabolism of normal individuals (both men and women), ofinfants, and of diabetics. Observations have also been made on theinfluence of various factors upon metabolism, as the ingestion of foodand of special diets; the breathing of oxygen-rich atmospheres; tem-perature environment; muscular activity, particularly bicycle riding,walking, and running; pregnancy,fasting, obesity; therapeutic agents;and moderate doses of alcohol. Researches have been carried outwith dogs to determine the influence on the metabolism of the removalof the hypophysis and of the effect of feeding meat to dogs having nopancreas, and with cats to study the influence of thyroid stimulation 26 NUTRITION LABORATORY. upon metabolism. A comparison has been made of direct and indirectcalorimetry, the various methods for determining the respiratory-exchan
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