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Scientific American, Vol. 59, No. 16 (1888) (1888)

leaf 7

An illustration from Scientific American, Vol. 59, No. 16 (1888), 1888, leaf 7
e same make, but beton, which is analogous to it. these latter, one permits of watching the ground of at- points. An idea is suggested to it, it graspsit, then In historic times, during the long period. styled an- tack, and the two others are designed for projecting repudiates, and then again… … yards beneath the natural return to the idea of the de- level of the earth. This gal- fensive cavern. In the num- lery, the length of which C. Projectile magazine. ber of prehistoric fortifica- necessarily varies with local G. Generators and kitchen. H. Coal room. tiens, seience admits those…

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