VERTICAL.—Upright or perpendicular. Vertical and perpendicular are not synonymous terms.
VERTEX.—See [Angle], [Quadrilateral], [Triangle]. The vertex of a solid is the point in which its axis intersects the lateral surface.
VIEW.—See [Elevation]. Views are called front, top, right or left side, back, or bottom, according as they are made on the different planes of projection. They are also sometimes named according to the part of the object shown, as edge view, end view, or face view.
WORKING DRAWING.—One which gives all the information necessary to enable the workman to construct the object.
Fig. 55.
Free-Hand Drawing.
A free-hand drawing is executed with the unaided hand and eye, without guiding instruments or other artificial help. It is necessary to be known that all drawing required cannot possibly be done by rule and compass, but that some portions must be drawn “free-hand,” trusting to the eye alone.