The Carpenter’s New Guide —— A Complete Book of Lines for Carpentry and Joinery, Treating Fully on Practical Geometry, Soffits, Groins, Niches, Roofs, and Domes, and Containing a Great Variety of Original Designs

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ISBN: 9781333036898 出版年：2016 页码：267 Peter Nicholson Forgotten Books

The next subject which regularly presents itself is Groins for the construction of which there will be found many methods entirely new; and besides the common figures, I have Shown many which are difficult of execution, and not to be found in any other author. I have displayed a variety of methods for constructing spherical niches, a form more frequently wanted than the elliptic, which only has yet been explained.