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)
the oval. Note.—An isometrical projection of a circle wouM be anellipsis; but the figure produced by the above method is so sim-ple in its construction and approaches so near to an ellipsis, thatit may be used in most cases, besides its facility of construction,its circumference is so nearly equal… … Ymuie 1 PLATE XXXIII. 95 Figure 3, To divide the drcumference of the Isometrical Circleinto any number of equal parts. 1st, Draw the circle and a square around it as in fig.2, the square may touch the circle as in fig. 2, or bedrawn outside as in fig. 3. 2nd. From the middle of one of the sides as…
