41. Describe the cutting stick and its substitutes.
42. What is the back gage, and how does it work?
43. Mention some improvements which have been made on the back gage.
44. How is the distance of the back gage read in hand-operated gages?
45. Describe an appliance for reading the movement of a back gage operated by power.
46. What contrivances are in use for cutting at any time duplicates of a given job?
47. How is the back gage locked?
48. How may piles of different widths be cut at the same time?
49. What device is used on the larger sizes of cutting machines?
50. What special devices have been applied to the back gage to increase production?