+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.