Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 457
the wind. All well-instructed inventors of to-day be-lieve that in order to fly with flapping wingsman must have someother power than hismuscles. Many lightmotors have been tried.The principal ones are:explosive compounds,steam, electricity, springs,and rubber bands. Allthese and others havebeen… … EARLY MODEL. describe only a fewdifferent kinds. One of the earliest was made by putting fourfeathers into a cork so as to make a propeller.Two of these propellers with feathers slopingin opposite ways were set on a stick, one pro-peller being fixed, the other revolving. A bowof whalebone was…
Children's literature
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