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The American house-carpenter; a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs. Together with the most important principles of practical geometry (1852)

Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 41

An illustration from The American house-carpenter; a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs. Together with the most important principles of practical geometry, 1852, leaf 41
Fig. 42. S3.— The same, without making- use of the centre of thecircle. Let a, (Fig. 42,) be the given point. From a, set offany distance to 6, and the same from b to c; join a and c ;upon a, with a 6 for radius, describe the arc, d b e ; make d bequal to be; through a and d, draw a line ; this… … a line to the centre d; bisect a d at e ; upon e, with the radius,e a, describe the arc, afd;fis the point of contact required. If/ and d were joined, the line would form right angles withthe tangent, b c. (See Art. 156.) b

Carpentry · Architecture

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