Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 263
Fig.! J lK V % -fy When the Diameter of the Circle is not given,Multiply the mean length of the two chords by* half their difference ; divide this product by the breadth of the zone, and to the quotient add the breadth. To the square of this sum add the square of the lesser chord, andthe square…
Engineering · Mechanical engineering
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