Recitation—
The conventions—Scale drawings, why? Figures on the drawing vs. the size of the object?
Seven kinds of lines—their meanings and how made?
When figures cannot be placed between the arrows, what?
What part of a mechanical drawing is to be made freehand?
A broken view? Why used?
Section drawing? Cross-hatching?
Hexagon, octagon, ellipse; how made?
Assignment for Lesson 4—
Essentials, Review Sections 34 and 36.