uel value of, 488
standard portion of, 479

Fish roe, vitamines in, 496

Fish steaks stuffed with oysters, preparation of, 125

Flaxseed, ash constituents of, 474
vitamines in, 497

Floating island, preparation of, 103

Flounder, fuel value of, 465
nutrient value of, 465

Flour, ash constituents of, 474
composition of, 488
food content of, 479
fuel value of, 465, 488
nutrient value of, 465
standard portion of, 479

Flours, diabetic, 403

Fluid diet, 62
in fevers, 282

Foamy omelet, preparation of, 100

Foamy sauce, preparation of, 111, 112

Food, or Foods, 1, and _see_ Foodstuffs
acid-forming, 184, 454
adulteration of, 67
allowance for children, 48
arrangement of, in stomach, 167
as fuel, 24, 36, 39
ash constituents of, 472, 473, 474, 475, 476, 477
base-forming, 184, 454
care of, 76
chemical composition of, 3, and 484 to 495
contamination of, 66
defined, 2
diabetic, 403
effect of cold upon, 39
effect of heat upon, 39
fuel value of, 36, 39, 221, 461 to 471, and 484 to 495
functions of, 2
idiosyncrasies to, 452
incomplete, as source of danger, 227
intake of, compared with output of energy, 425
materials, 2
mineral matter in, 25
nutrient value of, 461 to 471
passage of, from stomach, 168
preparation of, 69, 70
purin content of, 421
relation of, to mother's milk, 203
requirements of body, 42, 43, 51, 52
factors influencing, 43, 44
salt content of, 358, 359, 360
selection of, 52, 75
sources of, 2, 3, 4
transformation of into fuel, 37
uses of, 2, 425
vitamines in, 496, 497, 498
which produce fat, 448

Food materials, 2

Food poisoning, 66, 451

Foodstuffs, heat produced by oxidation of, 38

Forced feeding, 59

Formaldehyde, test for, 67

Formulas, determining fuel value of, 221
for constipation, 143
for feeding infants, 140, 212

Fowls, and _see_ Meat
composition of, 488
fuel value of, 466, 488
nutrient value of, 466

French dressing, preparation of, 134

Frozen custard, preparation of, 91

Fructose, 9

Fruit, preparation of, 126, 127, 128
vitamines in, 497

Fruit beverages, preparation of, 96

Fruit jellies, method for, 135
preparation of, 160

Fruit salads, preparation of, 131, 132

Fruit sauce, preparation