When seeds germinate, the lower end of the caulicle, which becomes the root, bears large numbers of root-hairs. Inside the root-hairs is protoplasm and cell sap. These root-hairs grow among the soil particles which lie covered over with a thin film of moisture. It is this moisture that is taken up by these root-hairs, and in it is a small amount of mineral matter in solution which helps to sustain the plant. The transmission of soil water through the delicate cell walls of these root-hairs is known as _osmosis_. GERMINATION OF SOME OF THE COMMON GRAINS Make a special study of corn, wheat, and buckwheat. Take three plates and put moist sand in each to a depth of about half an inch. Spread over this a piece of damp cloth. Put in No. 1, one hundred grains of corn; in No. 2, the same number of grains of wheat; and in No. 3, the same number of grains of buckwheat, peas, or beans. Cover each plate with another piece of damp cloth and invert another plate over each to prevent drying out. Keep in a warm room and do not allow the cloths to become dry. If one of the cloths be left hanging six or eight inches over the side of the plate and dipping into a dish of water, the whole cloth will be kept moist by capillarity. Note the following points: 1. Changes in the size of the seeds during the first twenty-four hours. 2. In which variety germination seems most rapid. 3. The percentage vitality, that is, the number of seeds which germinate out of one hundred. 4. The nature of the coverings and their use. (Protection to the parts inside) 5. The parts of the seed inside. (Buckwheat, pea, or bean divides into two parts, which become greenish and are called seed leaves. Wheat and corn do not divide thus.) 6. The first signs of growth. A little shoot or tiny plant begins to develop at one end of the seed. Note which end bears this tiny plant. 7. Note the development of this embryo plant and the formation of stem and root. 8. Of what use is the bulky part of the seed? To answer this, let the pupils separate the white part of a kernel of corn, which is attached to the embryo plant, from the pulpy mass surrounding it. Set five such plants in moist sand and also five germinating seeds not so dissected. Pupils will discover that the mass surrounding the embryo is for the nourishing of the embryo plant. It is a little store of food prepared by the mother plant for the little ones that grow from the seeds. Note that it disappears as the plant grows. To further show the great value of this stored plant food, put a large-sized pea in a pot of moist moss or sawdust for a few days. When it has germinated and its root is a couple of inches long, place the pea in a thistle tube or small funnel, with the root projecting down the tube into a glass of water in which the funnel tube rests. Place all in a sunny window and note how much growth the plant is able to make without any food except that which the seed contained.