81. Oven heat regulator
82. Illustrating the amount of heat represented by one Calorie
83. Comparative weights of 100-Calorie portions of food
84. 100-Calorie portions of food
85. Longitudinal section of wheat grain, showing bran, floury part, and germ
86. Growing yeast plants
87. Graduated measure and dipper for measuring the ingredients of modified milk
88. Some species of molds
89. The four types of bacteria
90. Canning foods