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limitations preclude commercial success, but not necessarily effective though extra-hazardous military service. They certainly do not preclude successful use in exploration, for all exploration, by any method, is essentially extra-hazardous. If our ship "America" or Zeppelin's were attempting a long voyage over Europe or America, and a strong adverse wind were encountered, the objective of the voyage might never be reached. In struggling against the wind the fuel would soon be exhausted, and most likely the navigators would in the end find it necessary to drift with the wind, no matter how far it were to take them out of their course. We are of course subject to the same conditions in the Arctic region, with this important difference: There we can take advantage of the physical characteristics of the country and throw out a drag-anchor, to glide over the surface of the ice fields and retard the drift of the ship in a contrary wind, thus losing little instead

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[[caption]] THE. STEEL-FRAME CAR OF THE AMERICA-LENGTH, 115 FEET-IN FOREGROUND TIP END OF STEEL TANK WITH CAPACITY OF 1,200 GALLONS OF GASOLINE.

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