The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 355
ore round-i7ig it. Make the angle, 0 c t, [Fig. 299,) equal to the angle, 0c t, at Fig. 292 ; upon c, describe a circle with a radius equal tohalf the thickness of the rail; draw the tangent, b c?, parallel tot c, and complete the rectangle, e b c?/, having sides tangical tothe circle; from c, draw… … bit in the gauge-mark at a, and bore in the direction, a c. To dcthis easily, make chucks as represented in the figure, the bottom^d^Q, g A, being parallel to o c, and having a place sawed out, ase/, to receive the rail. These being nailed to the bench, the railwill be held steadily in its proper…
Carpentry · Architecture
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-79-9.webp)
