National Geographic : 1932 Aug
WHY ORR?.U -IWf~e6dtz* * * * Taxes are certainly high on ice cubes from metal trays-add them up-loss from melting and wash ing cubes about 25%-surface temperature of cubes raised from 180 to 330 F.-time required to get only one cube; 2 minutes or more-waste of unused cubes-loss of temper-a tax on your disposition. Now, consider the economy of a Flexible Rubber Freezing Tray. You get all the ice you freeze; a slight finger-tip pressure releases the cubes one at a time or a whole trayful in ten seconds-the cubes are dry, colder, larger, clean and as pure as the water you use. Insist on this modern Ice Cube Convenience Over a million of these modern freezing trays are in use. All leading makes of automatic refrigera tors have them. Be sure they are in the refrigerator you buy or equip your refrigerator with them. Priced as low as $1.50 each. See the local dealer of your make of refrigerator, or write us giving the name of your refrigerator and the number of cubes the ice tray holds. THE INLAND MANUFACTURING COMPANY Dept. C-8, Dayton, Ohio Reg. U.S a.Of .AU e Exploring the Mysteries of Plant Life HOW PLANTS WORK ALL the factories, all the railroads, all the mines, all the automobiles, all the activities of man of what soever nature that require power, do not utilize as much energy as is developed by the plant world. Out of intangible sunshine, insubstantial air, and clear water, coupled with a modi cum of mineral matter from the soil, plants must manufacture all the food that keeps alive the innumerable hosts of animals of the earth, store up all the heat that keeps humanity warm and cooks its food, fur nish most of the power that drives its in dustries, and provide the raw material for all the clothes mankind wears and many of the products of which his factories, his houses, his furniture, and his books are made. Would you know how much of a plant is fabricated of sunshine, air, and water, and how little of solids from the earth ? Then burn that plant and notice the thin layer of ash remaining. All else has been made up from subtle sunbeams, thin air, and plain water. Every plant, from a simple moss to a giant tree, is in reality a vast household of individual entities working together, in fine cooperation and close harmony, to a com mon purpose. One group, etc. FROM THE INTRODUCTORY CHAPTER OF THE BOOK OF WILD FLOWERS A fascinating Geographic publication with color illustrations of 250 flowers and grasses and 114 family "biographies." The chapters on Plant Life by Dr. Wil liam J. Showalter and State Flowers by Dr. Gilbert Grosvenor are notable features of this entertaining and educational book. 243 pages, 10 x 7 inches. Embossed Molloy-made Binding. Postpaid in U. S. and Canada, $4.oo. For mailing abroad, add 25 cents. To order, address Department F NATIONAL GEOGRAPHIC SOCIETY WASHINGTON, D. C. "Mention the Geographic-It identifies you."