DECIMAL CLASSIFICATION 
641.1 Food chemicly considerd Food values Tables 
Tor methods of chemic analysis see 543.1; for adulterations see 614.3; for 
commercial preparation or manufacture see 664; for physiology of nutrition 
see 612.39; for dietetics see 613.2 
612.39 treats of physiologic effect of different kinds and quantities of foods 
from purely scientific point of view, without regard to benefit or injury 
613.2 treats of food requirements in special conditions of age or disease and of 
the beneficial or injurious effects of different kinds of foods 
641.1 translates scientific facts into familiar terms for eook and housekeeper, 
treats of the required amount of the different constituents and their propor- 
tion as found in various foods 
Organic food constituents 
Proteids or nitrogenous foods 
Meat, egs, nuts, legumes, etc. See also 612.398 
Carbohydrates or nonnitrogenous foods 
Vegetables, cereals, fruits, sugar See also 612.396 
Fats, oils 
See also 612.397 
15 Inorganic food constituents 
.16 Water 
.17 Salts, mineral or ash constituents 
.3 Animal and vegetable foods 
Clas here also works dealing both with food material and its preparation 
Subdivided like 630; e.g. 641.33 Cereals, 641.34 Fruits 
Prices Relativ cost 
Quality and other factors in buying for table 
Food preservation Markets 
Subdivide like 664 (not yet completed) 
For commercial methods see Chemic technology 664.8-.9; for transportation 
see 656 (subdivision not completed) 
Cookery Cook books 
rseneral recipes, specific directions, in whatever form (books, cards, etc) for 
preparing food 
Distinction between 612.39, 613.2 and 641.5: in 641.5 clas cook books and 
collections of recipes in which physiologic and hygienic effects of foods (if 
treated at all) ar secondary; in 613.2 clas dietaries and selection and prepara- 
tion of food for special systemic conditions, with recipes subsidiary or with 
recipes and diet about evenly balanst; in 612.39 clas scientific study of 
ohysiologic effects of various foods, regardless of benefit or injury 
See also 641.59 Recipes peculiar to special countries: 641.6 Cookery of specific 
substances; 641.7 Cookery by specific processes; 641 .8 Composit dishes, ices 
confectionery, beverages 
3rekfast 
Luncheon, afternoon tea, supper 
Dinner 
Economic cookery 
Special conditions 
Under limitations of age, helth. ethical or religious theories, etc. 
Children 
Invalids and aged Hospital cookery 
Ethical limitations 
Religious limitations 
Seasons and days: Lent, fast days, etc. 
Cults: Jews, Buddhists, etc. 
562 
563 
564 
565 
566 
£67