Functions of Plant Organs:
Simple experiments illustrating roots as organs of absorption, stems as organs of transmission, and leaves as organs of respiration, transpiration, and food building. (See pp. 273-8.)
Economic Study of Plants:
Comparative study of varieties of winter apples, of fall apples, or of other fruits of the locality; visits to orchards; weed studies continued. (See Form III.) (See pp. 229-30 and 239-40.)
Relation of Soil and Soil Tillage to Farm Crops:
Soil-forming agents, as running water, ice, frost, heat, wind, plants, and animals, and inferences as to methods of tillage. (See pp. 268-70.)
WINTER
Air and Liquid Pressure:
Simple illustrations of the buoyancy of liquids and of air; simple tests to demonstrate that air fills space and exerts pressure; the application of air pressure in the barometer, the common pump, the bicycle tire, etc. (See pp. 248-52.)
Oxygen and Carbon Dioxide: