+Physiology of Plants+ 273
Processes of plant growth—Nutrition—Water and gas as plant
food—Water culture—Osmosis—Experiment showing absorption—
Nitrates—Insectivorous plants able to absorb nitrogen to some
extent—Second experiment on absorption—Preparation of plant
food—Water bouquet—Transpiration—Use of Stomates—Respiration—
Seeds give off carbon-dioxide—Effect of light, darkness, and
heat—Reproduction—Protococcus—Strawberry runner—Asexual and
sexual reproduction—Effect of cold upon seeds.