51. How is the width of the cut measured?
52. Describe some modern patented spacing devices, and tell what they accomplish.
53. What is a clamp face?
54. What is a snake gage?
55. What special contrivance is used for large pamphlets, etc., and for what purpose?
56. What safety devices are required by some states?
57. What five methods of applying power are in use?
58. Give the four great rules for the care of the machines.
59. What advice is given about adjustment, stroke of the knife, pressure of the clamp, use of oil?
60. What is the right time to jog stock, and why?