The drawing from which the blue-print is made is called a working drawing. The method of preparing it is simple. The draftsman merely looks squarely at the object and draws the outline of it. By changing the point of view, different views of the object may be obtained. The views usually drawn are of the front, top, and side. To show the interior, additional views may be drawn of the object in section.

The front view of an object is the view obtained by looking squarely at it from the front. This view is often called the elevation. The top view is the view obtained by looking squarely at the object from the top. This view is often called the plan. The side view is the view obtained by looking squarely at the object from the end. This view is often called the profile view or the end elevation.

Fig. 99.   Rubber Biscuit.

Fig. 99. - Rubber Biscuit.