The Bookshelf for boys and girls Historic Tales and Golden Deeds part 4 (1912)
University Society, New York · New York. : University Society · leaf 73
rate of two feet a second (amoderate estimate), its force on striking the wallwould be 300,000 pounds, which would be exactlythe same as the force exerted by a weight of300,000 pounds in falling from a height of onefoot. That is, it would exert greater power thanany gun or cannon invented up to the… … moving-tower rams was that constructed by De-metrius Poliorcetes at the siege of Rhodes. Thebase of the tower was seventy-five feet square.The ram itself was an assembly of large squarebeams resting on wheels in size proportionedto the weight of the structure, and all rivetedtogether with iron. The…
Children's literature · Children's encyclopedias and dictionaries · Literature · Encyclopedias and dictionaries
Internet Archive · BYU–Idaho · Public Domain Mark 1.0. Free to use for anything.
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