212 REPORTS ON INVESTIGATIONS AND PROJECTS. 



METEOROLOGY. 



Bjerfcnes, V., and Sandstrom, J. W., Stockholm, Sweden. Grant No. 361. 

 Preparation of a work on the application of the methods of hydrodynamics 

 a7id thermodynamics to practical meteorology a?id hydrography. $1,200. 



The work was begun, in collaboration with Mr. J. W. Sandstrom, on 

 May I this year, and has been continued since then without interruption. 



It is expected that the first part of the treatise will be ready for print 

 before the end of this year. In this part the methods which can be devel- 

 oped from the principles of hydrostatics are treated completely. These 

 hydrostatical methods will be of fundamental importance for all that follows, 

 which will be developed from the principles of kinematics, from the principles 

 of hydrodynamics, and, finally, from the principles of thermodynamics. 



The most important part of the work hitherto performed has been the 

 calculation of a complete set of numerical tables to be employed by practical 

 use of the hydrostatical methods. 



NUTRITION. 



Benedict, Francis G., Wesleyan University, Middletown, Connecticut. Grant 

 ^o- 333- Researches in human nutrition. (For previous reports see 

 Year Book No. 2, p. xxxix ; Year Book No. 3, p. 130, and Year Book 

 No. 4, p. 258.) $10,000. 



Since the last report was submitted the investigations in nutrition have 

 dealt mainly with three problems. First, the investigations in metabolism 

 during inanition, begun under Grant No. 258, were extended to include 

 seven two-day experiments with fasting men in the respiration calorimeter. 

 Three of the fasting experiments were followed immediately by one or two 

 days with food. In all of these experiments the pulse rate, respiration rate, 

 and body temperature, as well as the analyses of urine and respiratory 

 products, were made. The determinations included the measurement of the 

 heat given off from the body as well as the potential energy of the urine. 

 A not inconsiderable portion of the time has been devoted to the prepara- 

 tion for publication of the extensive series of experiments on fasting. A 

 very large number of computations have been made and their results con- 

 densed into a series of tables. The literature of the subject has been 

 thoroughly gone over and the report is practically completed. 



The second line of work taken up was a study of the effect of the inges- 

 tion of food on metabolism, a subject naturally following that of the effect 

 of inanition on metabolism. In securing information regarding this factor 

 of nutrition, 39 experiments varying from 8 to 28 hours in duration were 

 made with the respiration calorimeter. Eight of them were fasting experi- 

 ments of 8 hours each, carried on to get a basis of comparison with experi- 

 ments in which food was ingested. In these experiments the subject was 

 required to remain quietly seated, and every precaution was taken to elimi- 



