(IS HKI'itKT n|' OFKM'K n|' KX I'Klfl M IIN'I' STATIONS. 



fcrciil \\:i\> wlii'ii iikkIc into ltrc;i(l. TIh' iin|iiii-v li;is liccii rspcciiiUy 

 siitisriiclory tlii> vrai'. as the cxpcriiiifiilal mill ot' lahoraloi'v si/c, 

 ])urcli:is('(l last vcar, has made it ])()ssil)lc to secure iiiiiroriii i^i'iuUis of 

 tloui' for use in (he investigations. 



Prof. ('. K. ^\'ait. at th(> I'niviM-sity of Teruiessco, Know ille, hus 

 continueci his in\ est ieat ions alonj^" i\w sjinii; lines jis hcretofofe, two 

 kinds of work l)eini>' undeitaken, nuinely, dii^tiirv studies witli wliitc 

 pcoph' of limited means in the niouiitiiin districts, and dij^'estion 

 ox])efiments for the ])urj)()S(; of stiidyiii*^ the di<^estil)ilitv <>f le<^uines. 

 In connection with the hitter, the income and outyfo of nltro<ron hus 

 l)eeii determined. 'V\h\ dietaiy studies ha\-e Ikhui carried out under 

 unfavorable conditions, hut the results are of es])ecial interest. 



FOOD AND NUTKITION PUBLICATIONS. 



The food and nutrition })ul)lications the past 3'ear hav«5 included six 

 technical ])ulletins, an article for the Year))ook of 1J>02, and an article 

 prepared for the report of this OfHce for the same year. The subjects 

 treated in these pu))lications are as follows: 



Dietary Studies in New York City in 1896 and 1807; Experiments 

 on the Pjffect of Muscular Work upon the Digestibilit}' of Food and 

 Metabolism of Nitrogen; Experiments on the Metal )olism of Nitroj^en, 

 Sulphur, and Phosphorus in the Human Organism; Studies on the 

 Digestilnlit}' and Nutritive Value of lircad at the University of Min- 

 nesota in 1900-1902; Dietary Studies in Boston and Springfield, Mass., 

 Philadelphia, Pa., and Chicago, 111.; Further Investigations among 

 Fruitarians at the California Agricultui'al Experiment Station; 

 Dietary Studies of Groups, especially in Public Institutions; the Cost 

 of Food as Related to its Nutritive Value. 



IRRIGATION INVESTIGATIONS. 



The irrigation investioations of this Office have been carried on dur- 

 ing the past year under the general direction of Prof. El wood Mead, 

 who, in addition to the general oversight of the work, spent two months 

 in Italy making a special stud}' into the irrigation laws and practice 

 of that countr}'. A field office is maintained at Cheyenne, Wyo., for 

 theKocky Mountain States, and one for California at Berkeley. Dur- 

 ing the year C. T. Johnston, assistant chief of these investigations, 

 resigned to accept the position of State engineer of W^'oming, and 

 C. E. Tait was placed in charge of the Chej^enne office. Prof. S. Fortier 

 has charge of the Berkeley office. 



The onh^ changes in the work from that of previous years were along 

 the lines of greater thoroughness and more advanced investigations in 

 the determination of the duty of water and in studies of the best means 

 of distributing and apidying it. It is l)elieved that the investigations 

 carried on during the year were in a field of urgent practical necessity 



