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A text book of geometrical drawing : abridged from the octavo edition : for the use of schools in which the definitions and rules of geometry are familiarly explained, the practical problems are arranged from the most simple to the more complex, and in their description technicalities are avoided as much as possible : with an introduction to isometrical drawing : and an essay on linear perspective and shadows ... (1849)

Minifie, William, 1805-1880 · Baltimore : Wm. Minifie & Co. · leaf 87

An illustration from A text book of geometrical drawing : abridged from the octavo edition : for the use of schools in which the definitions and rules of geometry are familiarly explained, the practical problems are arranged from the most simple to the more complex, and in their description technicalities are avoided as much as possible : with an introduction to isometrical drawing : and an essay on linear perspective and shadows ..., 1849, leaf 87
fig. 2. 3rd. If a cube be cut through the diagonals of threeadjoining faces, as in fig. 3, the section will be an equi-lateral triangle, whose side is equal to the diagonal ofa face of the cube. Two such sections may be madein a cube by cutting it again through the other threediagonals, and the… … lw.2.

Mechanical drawing · Geometry, Descriptive · Perspective

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