PATTERN 2.
Plate 14.
Arrange the circle a little smaller than for pattern 1, and on a level with the centre point of the work. Set the chuck wheel at 120, cut a circle; then one at 15, 30, 45, 60, 75, 90, 105, when you will find the eight outer circles of the pattern are formed. Then move the slide-rest screw forwards four numbers, and to No. 1 on the eccentric chuck wheel; then to Nos. 14-31, 44-61, 74-91, 104. By following the same rule in the other circles you will find the pattern is not difficult, though at first it may appear very intricate. As all depends upon properly counting the numbers on the eccentric chuck wheel, to make the calculation more easy, I give the proper numbers for the sixteen circles composing one cluster, and you will then see that the others can readily-be done the same, always remembering to move the slide-rest screw forwards four numbers for every row; 1, 15-2, 14-3, 13-4, 12-5, 11-6, 10-7, 9-8; the latter single number forms the centre or outer circle near the edge.