ELLIPSES.
An ellipse is a geometrical figure, and can be drawn as described in [geometrical problem 29], [page 96]; many drawing offices keep sets of hard rubber ellipses, to economize time constructing them.
Fig. 169.
Fig. 170.
An ellipse is a geometrical figure, and can be drawn as described in [geometrical problem 29], [page 96]; many drawing offices keep sets of hard rubber ellipses, to economize time constructing them.
Fig. 169.
Fig. 170.