The Bookshelf for boys and girls Children's Book of Fact and Fancy part 2 (1912)
University Society, New York · New York : University Society · leaf 52
on edge under theweight than if the weight is laid on the side of theboard while the board rests at its ends on sup-ports. And the board will support a still greaterweight if the board is hung up by its upper endand the weight is hung on its lower end. So a fastened in place by a single bolt at… … FiG. 6. A PAPER-AND-STKING MODEL OFA TRUSS BRIDGE. into the hridge in the way in which they arestrongest. The paper-and-string model, Fig. 6, of thebridge truss is holding a piece of lead-pencil; andit shows that only the four boards that make upthe upper chord of the truss are pushed on bythe…
Children's literature · Children's encyclopedias and dictionaries · Literature · Encyclopedias and dictionaries
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