30 KEPORT OF OFFICE OF EXPERIMENT STATIONS. 



at Wellesley College, the object of this Avork being to secure data 

 for a F'armers' Bulletin. A Yearbook article on '' Fruit and Its 

 Uses as Food '' was prej^ared by C. F. LangAvorth}-, as Avell as a 

 report on the condition of nutrition investigations and similar 

 articles. 



Three dietary studies at homes for the aged and two at orphan 

 asylums were undertaken l)v Doctor Langworthv and H. L. Knijiht, 

 in cooperation with charitable institutions in lialtimore. Md., with 

 a vieAV to obtaining factors for use in determining the relative 

 amounts of food required by the aged aiid by the young. 



In cooperation with the Office, Miss Juniata L. Shepperd, of the 

 College of Agriciilliire of the University of Minnesota, has prepared 

 a summary of data on the ways in which the miti'ition in\'(^stigations 

 carried on iindei- (he auspices of the Department of Agriculture are 

 used bv teachers of home economics. i)articularlv in the aaiMcul- 

 tural colleges. 



Prof. M. F. Jatt'a and his associates at the University of California 

 have continued their investigations on the digestibility of fruits and 

 nuts and their nutritive value when forming an integral jiart of a 

 mixed diet, as well as the effects of different amounts and combina- 

 tions upon the utilization of these food products. Owing to the 

 importance of the fruit and nut industry in California and the large 

 variety of fruits and nuts obtainable in that section, the University 

 of California is a particularly favorable place for such investigations 

 and the Avork has met with cordial support. In cari'ving on his 

 studies Professor Jaffa has made, during the fiscal year, twenty-five 

 digestion exi)eriments, which have also inchuled studies of the iii- 

 come and outgo of nitrogen. As a whole, his investigation-; have 

 shown that fiMiits and nuts are quite thoroughly digested and that 

 they nuiy be used as reasonably economical constituents of the diet 

 even in large amounts. 



The investigations carried on at Wesleyan Fniversity, Middle- 

 town, Conn., by l*rof. F. G. J^enedict and his associates, have had to 

 do with the digestibility and food value of green curd and of Ameri- 

 enn CluMldar ('he(>se made with different amounts of rennet and cured 

 for diil'erent lengths of time, the ease and rai)idity of digestion of 

 cheese, and the value of this food as a source of energy. In studying 

 llic (piolion of energy, the AtAvater-Benedict respiration calorimeter 

 was used, as well as in investigations of the normal output of carbon 

 dioxid and heat and the oxygen int;d<(' of the lioily under a xariety 

 of conditions. The Dairy Division of the bureau of Animal Indus- 

 try cooperated in the cheese investigations, having furnished the 

 samples used and rendered material assistance in other ways. 



In the LSI digestion exi)eriments in which fi-om 1^0 to 'J(H) grams 

 of cheese Averc taken per day Avith a basal ration of bread and fruit, 



