1. Look up the subject of bits and braces.

2. What is an auger bit, a gimlet bit, a twist drill?

3. Why will the twist drill work better in iron than the auger bit?

4. What is the use of the spur on the auger bit?

5. What does the worm do?

6. How are sizes of auger bits marked? Sizes of gimlet bits?

7. What is a hollow bit?

8. How can you bore thru a board without splintering it on the farther side?

9. Study the evolution of the boring tool, showing changes that have taken place in the cutting tool itself, in the method of turning it, in the method of pressing it to its work, in the method of holding it in the turning and pressing device. Start with the brad-awl, and, by means of pictures taken from trade catalogs, show the gradual changes that have taken place up to the power driven automatic drill and the boring mill.

9. Look up rock drills.