476 KEPORT OF OFFICE OF EXPERIMENT STATIONS. 



rials used. It embraces also a consideration of the hygienic and pecuniary economy 

 of their diet, its deficiencies, the ways in which it might be improved, and the steps 

 which should be taken to bring about an improvement. 



Bulletin No. 40. — Dietary Studies in New Mexico in 1895. By Arthur 

 Goss, M. S., Professor of Chemistry, New Mexico College of Agri- 

 culture and Mechanic Arts. Pp. 23. Price 5 cents. 



An account of two dietary studies with Mexican families of limited means and 

 one study of a family in more comfortable circumstances. The composition of a 

 number of foods typical of this region in New Mexico is reported, and the dietary 

 studies are discussed in relation to their environment and to results of similar studies 

 made elsewhere. 



Bulletin No. 43. — Losses in Boiling Vegetables, and the Composition 

 and Digestibility of Potatoes and Eggs. By H. Snyder, B. S. , Almah 

 J. Frisbie, M. D., and A. P. Bryant, M. S. Pp. 31, figs. 7. Price 

 5 cents. 



This bulletin contains three articles: The first, by H. Snyder, is entitled "The 

 Loss of Nutrients in Boiling Potatoes, Carrots, and Cabbages," and reports a num- 

 ber of experiments on the losses which these vegetables undergo when boiled in 

 different ways. The second, entitled "The Digestibility of Potatoes and Eggs," by 

 H. Snyder, reports experiments on the digestibility of boiled eggs in pepsin solution 

 and digestion experiments with a man on a mixed diet of which eggs were the prin- 

 cipal constituent. The third article is entitled ' ' The Composition of Different Parts 

 of the Potato and the Loss of Nutrients During the Process of Boiling," by Almah 

 J. Frisbie and A. P. Bryant, and reports the composition of different parts of the 

 potato and experiments on the loss of nutrients when potatoes are boiled in different 

 ways. 



Bulletin No. 44. — Report of Preliminary Investigations on the Metab- 

 olism of Nitrogen and Carbon in the Human Organism with a Res- 

 piration Calorimeter of Special Construction. By W. O. Atwater, 

 Ph. D., C. D. Woods, B. S., and F. G. Benedict, Ph. D. Pp. 64, 

 figs. 4. Price 5 cents. 



A detailed description of a respiration calorimeter suitable for experiments with 

 man is given, and the methods and apparatus employed in the collection and analysis 

 of the liquid, solid, and gaseous excretory products are described. Four experiments 

 are reported in which the subjects remained in the respiration chamber for from 

 three to twelve days. The foods and excretory products were analyzed and the 

 balance of income and outgo of nitrogen and carbon determined. 



Bulletin No. 45. — A Digest of Metabolism Experiments in which the 

 Balance of Income and Outgo was Determined. By W. O. Atwater, 

 Ph. D., and C. F. Langworthy, Ph. D. Pp. 434. Price 25 cents. 



A compilation including 2,300 experiments with man and 1,400 with domestic 

 animals in which the balance of income and outgo of nitrogen, or nitrogen and car- 

 bon, with or without oxygen, hydrogen, or mineral matter was determined. The 

 experiments are classified and arranged, and the tables of results are supplemented 

 by text in which the experiments are described, the objects sought, the experi- 

 mental methods employed, and the conclusions drawn being noted in more or less 

 detail. 



