36 EEPOKT OF OFFICE OF EXPERIMENT STATIONS. 



summarized in Farmers' Bulletins and other popular publications 

 designed for general circulation, a total of 60 technical bulletins and 

 46 Farmers' Bulletins and jDopular summaries having been published 

 up to the present time, together with numerous reports of progress 

 and similar articles. That the data thus reported are of general 

 interest is indicated by the fact that the demand for technical 

 bulletins almost always exceeds tlie supply, while the requests for 

 popular bulletins can only be met by reprinting them at frequent 

 intervals. Of 22 Farmers' Bulletins on nutrition topics now avail- 

 able, the department records show that a total of over 7,000.000 copies 

 have been distributed and almost entirely upon request. 



During the past year 1 technical bulletin, a series of 15 colored 

 food and nutrition charts, 3 Farmers' Bulletins, and 1 circular 

 were issued. The technical bulletin reports the results of studies of 

 calcium, magnesium, and phosphoiiis in food and nutrition. The 

 food charts, which are of a size suitable for classroom use, are de- 

 signed to show in graphic form the composition and nutritive value 

 of a considerable number of food materials in common use in the 

 American home. Outline figures representing a variety of food mate- 

 rials are divided in such a way that the proportions of water, protein, 

 fat, carbohydrates, and ash are indicated and colored, so that the 

 kind of nutritive material present and the relative amount may be 

 seen at a glance in much the same way that the proportion of land 

 and water in a country and the general character of the surface may 

 be seen from a map. 



The Farmers' Bidletins have to do with the economical use of meat 

 in the home, with bread and bread making, and with the care of milk 

 and its use in the home, the last-mentioned bulletin having been pre- 

 pared in cooiDcration with the Bureau of Animal Industry. 



The circular describes briefly the organization and extent of the 

 nutrition investigations, the methods of distributing nutrition bul- 

 letins, and lists and describes the publications issued in connection 

 with the enterj^rise. It is designed particularh^ to meet the requests 

 for information received from investigators and other interested per- 

 sons in various countries. 



In addition to the above, a technical bulletin, a Farmer's Bulletin 

 dealing with the economical use of cheese in the diet, and a circular 

 discussing food in American homes have been prepared for publi- 

 cation, while several special articles and technical reports are ap- 

 proaching completion. 



As a part of the regular work in nutrition, abstracts of the cur- 

 rent literature on the general subjects of physiological chemistry and 

 nutrition were prepared for the Experiment Station Record, as well 

 as popular summaries, particularly of work carried on at the Ameri- 

 can experiment stations, for publication in the series of Farmers' 

 Bulletins entitled " Experiment Station Work." 



