362 REPORT OF OFFICE OF EXPERIMENT STATIONS. 



Numerous studies have been undertaken of the changes brought 

 about and losses sustained when foods of different sorts are cooked 

 in different ways, the principal food materials included in this work 

 being bread, vegetables, and meat. Cannmg and preserving fruits 

 and vegetables may be regarded as special applications of cooking 

 processes and much experimental work has been done along these 

 lines with a view to the elaboration of satisfactory^ household methods. 

 In general, it may be said that in connection with the different lines 

 of work mentioned it has been necessary to devise and perfect experi- 

 mental methods, as at the time the investigations were first under- 

 taken the amount of work which had been done in the United States 

 and elsewhere along similar lines was not very considerable. 



The same period which has witnessed the development of the 

 nutrition enterprise has seen a great interest aroused in the teaching 

 of home economics in schools and colleges, and nutrition is one of the 

 main divisions included in this subject. As the nutrition investiga- 

 tions have supplied a great deal of data which the teachers of home 

 economics must use and as the Office was already closely identified 

 with other educational enterprises, it was almost inevitable that the 

 pedagogics of nutrition should receive attention and become an 

 increasingly important part of the nutrition enterprise. 



The preparation of reports of investigations and popular summaries 

 has also constituted an important feature of the work. 



The following table shows in graphic form the character and 

 extent of the investigations which have been undertaken up to July 

 1, 1906: 



Cooperative nutrition investigations of the Office of Experiment Stations. 



Line of work. 



Dietary studies 



Digestion experiments 



Experiments on the effect of different circumstances on the income and outgo of 



nitrogen 



Respiration calorimeter experiments 



Experiments on effects of cooking on meats 



Experiments on losses in cooking vegetables 



Investigations on changes and losses in bread making 



Special investigations 



Compilation of data 



Preparation of popular summaries 



Number Number 

 of inves- | of publi- 

 tigations.; cations. 



485 

 675 



500 



88 



157 



12 



3 



5 



20 

 18 



C) 



6 

 3 

 1 

 2 

 2 

 4 

 30 



a These investigations are in<?luded in the publications reporting digestion expierinients. 



In addition to the popular summaries and the teclmical bulletins 

 included in the above table, a large number of briefer summaries 

 have been prepared which have appeared in the series of farmers' 

 bulletins entitled "Experiment Station Work," and for the last ten 

 years the subject of food .ind nutrition has constituted one of the 

 divisions of the Exj)erimont Station Record, and abstracts of the 

 current literature of the subject have appeared regularly. 



