Richey's guide and assistant for carpenters and mechanics : a work of practical information, giving almost every geometrical and practical problem likely to arise in the work of the carpenter, and quick and easy methods for their solution : the use of the steel square, etc., tables showing strength and weight of materials, methods of framing, useful recipes, etc., etc. (1894)
Richey, H. G. (Harry Grant), b. 1868 · New York : W.T. Comstock · leaf 126
Fig 175 I20 GUIDE AND ASSISTANT 152—Diagram to Obtain Degrees on the Square.— For instance, if a pitch of 25° is required, use 5I on thetongue of the square and 12 on the blade; for 65° it isjust the reverse, or 12 on the tongue and 5^ on the blade.See Fig. 175. 153—To Mitre a Circle and Straight…
Carpentry
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