262 CARNEGIE INSTITUTION OF WASHINGTON. 



has been undertaken to study the metabohsm of the white rat under various 

 conditions of age, activity, temperature environment, and nutritional plane. 

 A special respiration apparatus, which measures both the carbon-dioxide 

 production and the oxygen consumption of these small animals, has been 

 installed and has been in continuous use throughout the year. The investiga- 

 tion has been in the hands of Miss Grace MacLeod, who has been assisted 

 by Miss Margaret G. Barwis. 



Metabolism during pregnancy. — Dr. H. F. Root, assisted by Miss Baker, has 

 made a series of metabolism measurements on a volunteer subject during 

 pregnancy from the third month to several weeks after parturition. 



PUBLICITY ACTIVITIES. 

 In conformance with the general policy of the Carnegie Institution of 

 Washington, special attention has been given this past year to the preparation 

 of several popular articles describing the work of the Laboratory and its 

 practical application. Several lectures have been given by members of the 

 staff before medical societies and the general public. In these lectures 

 motion-picture films of the Laboratory technique have played a rather promi- 

 nent role. In many of our researches the motion -picture film has been found 

 to be a valuable adjunct for recording scientific events. 



PUBLICATIONS. 

 During the past year, a considerable amount of time has been given to the 

 preparation of two large reports for publication. One of these, Diabetic 

 Metabolism with High and Low Diets, is the third monograph on the metabolism 

 of diabetics. The other. Undernutrition in Steers, is the first report of the co- 

 operative investigation at the New Hampshire Agricultural Experiment 

 Station. These monographs are now ready for the printer. The following 

 publications have been issued during the year : 



(1) The skin temperature of pachyderms. Francis G. Benedict, Edward L. Fox, and Marion 



L. Baker. Proc. Nat. Acad. Sci., vol. 7, p. 154 (1921). 



An abbreviated presentation of material published in detail in the American 

 Journal of Physiology, vol. 56, p. 464 (1921), and abstracted in the annual 

 report of the Director for 192 L 



(2) Metabolism studies with enemata of dextrose and levulose. Thorne M. Carpenter. Proc. 



Amer. Physiol. Soc, Amer. Jour. Physiol., vol. 59, p. 440 (1922). 



An abstract of a paper given at the meeting of the Federation of American 

 Societies for Experimental Biology at New Haven, December 192 L 



(3) The relative alcohol content of blood and urine. W. R. Miles. Proc. Amer. Physiol. Soc, 



Amer. Jour. Physiol., vol. 59, p. 477 (1922). 



An abstract of a paper given at the meeting of the Federation of Anaerican 

 Societies for Experimental Biology at New Haven, December 1921, giving the 

 concentration of alcohol appearing in the human blood and urine after the 

 taking of 27.5 grams absolute alcohol in various dilutions. 



(4) Note on electric counters. W. R. Miles. Jour. Exp. Psychol., vol. 5, p. 76 (1922). 



A description of the characteristics of an inexpensive commercial type of 

 electric counter that has various laboratory uses. 



(5) Static equilibrium as a useful test of motor control. Walter R. Miles. Jour. Indus. 



Hygiene, vol. 3, p. 316 (1922). 



A general review is presented, indicating some previous uses made of the 

 station test. A relatively simple apparatus called, for convenience, an ataxi- 



