The Garden Under Glass

GLOSSARY 349 Callus.—Some little time after a cutting has been inserted the base begins to swell preparatory to the emission of roots. This is called “ callusing,” and it is a fairly certain sign that the cutting will eventually throw out roots. Certainly it is a sign that the species to which the cutting belongs is amenable to this form of propagation. Cast.__Flower pots are usually sold by the cast. A certain number goes to the cast according to the size. The larger the size of the pot the smaller the number in a cast. Check.—A check is said to be given to a plant when there is some disturbance which temporarily stops its growth. A chili, removal to colder quarters, the state of being root-bound, shortage of water, frost, breakage, repotting, pinching the growths—these are some of the factors which cause a check. Chit.__The growths which form on a potato before it is planted are called chits. Often these are encouraged to form to the extent of an inch to induce a better crop. To start the tubers thus they should be set in a shallow tray or box placed in a cool but not hot greenhouse a few weeks prior to planting. Clinker.—The hard substances which form on the bars ot a greenhouse fire are called clinkers. Ihey occur chiefly when the fire is being driven hard. They are extracted by lunning the fire bar beneath them when the fire is somewhat low, up-lifting them and then pulling them out. They are useful for putting into the bottom of newly made paths. Cloche.—A French word for bell-glass which see. Cocoa-nut Fibre—The refuse from cocoa-nut fibre is valu-able for putting in a propagator, or for mixing with soil for seeds, as it holds moisture well without keeping out air. Coddle.—To coddle a plant is to make too much of it—to give it too warm a temperature, or too closc an atmosphcre. In its effect it is not less harmful (han neglect. Collar.—A piece of tin or zinc put round the inner rim of a flower pot and st ånding an inch or more above it so as to increase its capacity for holding soil is termed a collar. I he