Mechanical exercises, or, The elements and practice of carpentry, joinery, bricklaying, masonry, slating, plastering, painting, smithing, and turning . Tu/Jl. Xiti^ml^iKTi-jfMrrrh 2f>J»:JJfiy^r7fiahStfhonri 2 PRACTICAL GEOMETRY. 11 PLATE IL Fig. 1, 2, 3, 4 are all parallelopipeds and con-sist of six sides, when two opposite sides are per-pendicular to the other four, the parallelopipedis denominated a rectangular prism, and if thefour sides be equal rectangles, the prism is calleda square prism as fig. 1, 2; and if all the foursides are equal squares, the prism is called a cube,as
Mechanical exercises, or, The elements and practice of carpentry, joinery, bricklaying, masonry, slating, plastering, painting, smithing, and turning . Tu/Jl. Xiti^ml^iKTi-jfMrrrh 2f>J»:JJfiy^r7fiahStfhonri 2 PRACTICAL GEOMETRY. 11 PLATE IL Fig. 1, 2, 3, 4 are all parallelopipeds and con-sist of six sides, when two opposite sides are per-pendicular to the other four, the parallelopipedis denominated a rectangular prism, and if thefour sides be equal rectangles, the prism is calleda square prism as fig. 1, 2; and if all the foursides are equal squares, the prism is called a cube,as fig. 1, The reason why called a parallel-opiped is because each pair of opposite sides areparallel planes. The structure of a rectangularprism occurs more frequently in the practice ofcarpentry and joinery than any other form what-ever, all timbers and boards for the use of build-ing are cut into this form. Doors, shutters, & thin rectangular prisms, as fig. 4. Fig. 5 is a cylinder. Fig. 6 a hollow cylinder. Fig. 7 the section of a cylinder cut oiF by aplane parallel to the axis. Fig. 8 the sector of a cylinder contained bytwo planes forming an ang
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Keywords: ., bookcentury1800, books, booksubjectcarpentry, booksubjectgeometry
