24 RKPOTIT or OFFICE OF FA'PERTMENT STATIONS. 



THE WORK AT DIFFERENT PLACES. 



The Ollice of Experiment Stations has had the general supervision 

 of the phins and expenditures of the nutrition investi'^ations during 

 the i)ast year, and. in cooperation with the eoUaborators, has made 

 detaiUnl phins for the various experiments which have been under- 

 taken. The editorial work of the Washington office, as in the past, 

 has included the final preparation of reports of investigations for 

 publication and also the preparation of popular bulletins and sum- 

 maries. The collection of bibliographical data relating to nutrition 

 has been continued, as well as the preparation of abstracts and re- 

 views of the current literature of the subject, i)artly for use in the 

 Experiment Station Record and partly for such other purposes as 

 seemed desirable in connection with the general inquiry. In addi- 

 tion, many teachers, students, and specialists have been supplied by 

 correspondence and in other ways with information and data which 

 were not readily accessible in printed form. The increase in corre- 

 spondence, the growing demand for nutrition publications, and the 

 large number of requests for lectures and informal talks on these 

 subjects indicate that popular interest in the work is growing. The 

 nutrition work of the Washington office is in charge of Dr. C. F. 

 Langwortll)^ 



At the University of California Prof. M. E. Jaffa and associates 

 have continued investigations on the digestibility of fruits and nuts 

 and their nutritive value when forming a part of a mixed diet, as 

 w^ell as the amounts consumed under a variety of circumstances, with 

 a view of learning how thoroughl}^ these important foods are util- 

 ized in the body and their relative value in the diet. The importance 

 of the fruit and nut industry in California and the great variety 

 obtainable in that section make the University of California a jjar- 

 ticularly favorable place for these investigations. In carrying on 

 this work Professor Jaffa has made nine digestion experiments, in- 

 cluding studies of the income and outgo of nitrogen, and has devoted 

 considerable time to tabulating and editing the results of 35 metab- 

 olism experiments and 2 dietary studies previously conducted. As 

 a whole, the work indicates that fruits and nuts have a higher 

 dietetic value when intelligently used than is commonly supposed, 

 and that the wise use of such foods would add to the attractiveness 

 and wholesomeness of the diet. 



The work at Middletown, Conn., in which Wesleyan University 

 cooperated with this Department, has been conducted under the direc- 

 tion of Prof. F. G. Benedict, and has included experiments with the 

 respiration calorimeter on the effects of severe muscular exercise 

 and of mental work on the output of carbon dioxid and heat and on 

 the intake of oxygen; that is to say, upon the comparative demands 



