PATTERN 5.
The middle and second row of circles are too simple to require explanation. For the clusters of rings, begin with the middle row; cut two a little apart from each other, then one through the middle of them, and so on to the end; set the eccentric chuck wheel to the middle circle of one of the clusters, and move the eccentric chuck downwards, till the tool can cut through the middle of the others, then upwards the same number of turns. The extra half circle is made by moving the wheel of the lathe with the hand, as for the arc patterns, and counting the numbers on the eccentric chuck wheel, between those already formed.