A shorter course in woodworking; a practical manual for home and school (1911)
Wheeler, Charles G. (Charles Gardner), 1855-1946 · New York, London, G.P. Putnam's sons · leaf 240
Fig- 558 Fig- 559 Though a very slight-looking affair, it will support an enormous weight.Bridges of this kind made by pupils of the writer have supported theweight of entire classes (several thousand pounds), and long levers havesometimes been necessary to break them. Such experiments show…
Woodwork
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