78 BULLETIN OP THE UNIVERSITY OP WISCONSIN. 



Appendix to Group iv. The ossein of bones and gelatin; cartilage and 

 chondrin; keratin and elastin from skin and connective tissue, — 

 approach the albuminoids in composition, and may serve in a 

 measure, some of the same purposes in the body as those to which 

 the true albuminoids are applied. This series of compounds may 

 conveniently be designated the osseids. 



Class II. — Food Adjuncts. 



Group i. Alcohol, as contained in beers, wines, and spirits. 



Group ii. Volatile or Essential Oils, and other odorous and aromatic 



compounds, as contained in condiments, like mustard and pepper, 



and in spices, as ginger and cloves. 

 Group iii. Acids, as citric acid in lemons, malic in apples, tartaric in 



grapes, oxalic in rhubarb, and acetic in vinegar and pickles. 

 Group iv. Alkaloids, as caffeine in coffee and tea, theobromine in cocoa, 



and nicotine in tobacco. 



§2. Statistical Summary of Studies on Foods. — With this 

 word upon the subject of nutritive values in general the returns 

 from the questionnaire relating to food may be presented. The 

 figures denote the number of times the various dishes were eaten, 

 in a single week, and indicate simply the relative frequency with 

 which certain articles of food are found in our students' dieta- 

 ries. From an examination of the tables and individual diet 

 lists it will become evident, and this is a point worth noting ear- 

 ly, that brain workers in our community have set before them 

 substantially the same bills of fare that manual laborers do, or 

 that they discussed themselves when they were upon the farm, 

 living an active out-door life. 



The different articles of food arranged according to their rela- 

 tive frequency in dietaries are given below. The returns do not 

 indicate the precise days of the year upon which records were 

 made ; but it may be sufficiently definite to know that the blanks 

 were distributed on March 23, and were all returned by 

 April 27 : 



