These few illustrations from [fig. 212] to [fig. 219] are made designedly simple, so that they may be utilized in “free-hand” work, for which they are good practice, as well as serving for examples in mechanical drawing.
Figs. 212.
[Figs. 212], showing a spool or bobbin, exhibit three views, viz.: front elevation or plan, and section; both are drawn with simple lines, the end elevation by circles.
Fig. 213.—Fig. 214.
[Figs. 213 and 214] are two side views of a hexagon head bolt. [Figs. 216 and 217] are a square head bolt—two side views and end view. [Figs. 218 and 219] are a front and edge view of a forked or double joint.
Figs. 215.
[Figs. 215] show three views of a file handle; the front view and section are practice for compound curves and curved lines meeting straight ones; all these are capable of being produced by instruments.