The United States has been the model for not only government but The Death Hook of the Skies Wars of the future are to be waged below the surface of the sea The Cleveland housewife can store a barrel of apples in the city re- No longer is it necessary to leave the United States if one would be impressed by the great mysteries of Nature. California has a The fortune emanated from a woman's little workshop, originally The employer of today is learning that it is cheaper to have his em- Missouri is planting fruit trees along her roadsides, hoping that in The telephoto camera is to take the place of the military scout with The concrete bridge which is now being built lets the flood waters roll over it as it stands firmly on its foundations Time was when "Death Valley" could be crossed by only the expert, 60 The enormous income realized from certain acres in California makes the land the highest priced in existence used for agriculture Beauty in the Back Yard Mr. City prizes for beautiful back yards are not uncommon, but they usually fall to the expert, and not the ordinary householder. Farrington gives suggestions on how to obtain the desired effect Farmers Adopt the "Caterpillar" 68 E. F. Farrington 75 The new type of agricultural engine makes its own road Where Earning and Learning Go Hand in Hand. Robert H. Moulton To Guard Our Coasts from Water We have yet to learn from Europe how to keep from losing to the sea thousands of acres of valuable land Scientific Street-Planning 93 Residence and business districts do not conflict in the city that has reordered its physical makeup Beating the Dutch on Bulbs It has been the people of wooden shoes who raised unsurpassable flowers from bulbs until government experts began to grow better ones in the State of Washington Gasoline Jack of All Trades The horse is losing his place as the farm hand's companion because the gasoline engine can be made to do the work more efficiently Guarding Ships by a Double Lookout The lookout's importance is once more being realized. atlantic shipowners realize no anti-collision device is fool-proof New Way to Save Wild Game. Iowa is renting small bits of land to use as game preserves Twelve Great Scientists. Two mysterious scourges have been the greatest menace to childhood until Dr. Simon Flexner practically eliminated spinal meningitis by his discovery of the serum. Today he is at work on the second, infantile paralysis. His work has given him place among the "Twelve Great Scientists" A Billion Dollar Income A contrast between the wealthiest, and the most thickly populated regions in the world Technical World Magazine should be on the news stands on the 17th of the month preceding the date of issue. Patrons unable to get the magazine on the 17th will confer a favor by notifying the Circulation Manager. News-stand patrons should instruct their Newsdealer to reserve their copy of Technical World, otherwise they are likely to find the magazine "sold out". TERMS: $1.50 a year; 75 cents for six months; 15 cents a copy. Foreign postage, $1.00 additional; Canadian postage, 25 cents additional. Notice of change of address should be given thirty days in advance to avoid missing a number. 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