Foster, Edwin W. [from old catalog] · Garden City, N.Y., Doubleday, Page & company · leaf 112
nning is only required when the line out isinsufficient. The tetrahedral form invented by Dr. GrahamBell is unique and interesting. Based on thegeometrical figure, it has a remarkable strengthof frame, and possesses a surprising lifting power.The principal difficulty in the construction is in KITES… … g KZ
Carpentry · Woodwork
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