Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 487
iA^ Vol. XXI.—60. … THE CAUSE OF CYCLONES. From the Gulf of Mexico to the north pole, and fromthe Lakes to the Rocky Mountains, is a vast extent ofcountry crossed by no mountain chains to intercept orretard the velocity of air-currents. The extent of this country is equaled by none on earth.Cold air being heavier to…
Children's literature
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