268 CARNEGIE INSTITUTION OF WASHINGTON. 



graphic record, which serves as a check upon and a rough analysis of 

 the quantitative score. This test is a very easy one to give and will 

 probably be of considerable significance in determining the effects of 

 small amounts of alcohol and in measuring the effects of nutritional 

 factors and such conditions as fatigue. 



Portable respiration apparatus. — The increasing use by clinicians of 

 the study of the gaseous exchange, particularly the oxygen consump- 

 tion, has resulted in an unexpected interest in the portable or, more 

 properly speaking, transportable respiration apparatus referred to 

 in the annual report for 1918. Need for a truly portable apparatus 

 of relatively simple design, which would be primarily adapted to 

 clinical if not, indeed, for office use by physicians, led to a modifica- 

 tion of the earlier apparatus and the construction by our mechani- 

 cian, Mr. Collins, of several of these according to the new design. 



Minor apparatus. — The increasing use of motion pictures to study 

 and record not only scientific technique but physiological processes 

 has resulted in the purchase of a projection machine to supplement our 

 excellent motion-picture camera. 



COOPERATING AND VISITING INVESTIGATORS. 



Dr. Eliott P. Joslin, with his personal assistants, Dr. Albert A. 

 Hornor and Miss Anna Holt, has spent much time at the Laboratory 

 in preparing the report of the large amount of work on metabolism in 

 diabetes mellitus. 



Dr. Fritz B. Talbot contributed to the preparation of the final report 

 on the metabolism of children from birth to puberty. 



Dr. J. Arthur Harris has again kindly consented to review statis- 

 tically several important metabolism problems, and a paper is now 

 nearing completion. 



Mrs. Cornelia Golay Benedict, at the urgent demand of a number of 

 physicians, has continued her calorimetric studies of extra foods. A 

 third report of her results is being prepared. 



The unusual success of the research on the energy requirements of 

 large animals with the new respiration apparatus at the New Hamp- 

 shire Agricultural Experiment Station in Durham has resulted in 

 arrangements whereby Professor E. G. Ritzman devotes an even 

 larger proportion of his time to this work, and, with the counsel of 

 Director John C. Kendall, experimental activities at that station are 

 greater than ever. 



Dr. Paul Roth, a frequent visitor at the Nutrition Laboratory and 

 one of the co-authors of the report on undernutrition (Publication No. 

 280), has most helpfully cooperated by making an exhaustive clinical 

 test of the new portable respiration apparatus in his laboratory at the 

 Battle Creek Sanitarium, Battle Creek, Michigan. 



