2½ 2 1½

3 1 1½
3 1½ 2-7/8
3 2 2-5/8
3 2½ 2¼

3½ 1 3-3/8
3½ 1½ 3-1/8
3½ 2 2-7/8
3½ 2½ 2½
3½ 3 1¾

4 2 3½
4 2½ 3-1/8
4 3 2-5/8
4 3½ 2

5 3 4
5 4 3

For larger ovals multiples of these numbers may be taken; thus for 7 and
4, take from the table twice the width corresponding to 3½ and 2, which
is twice 2-7/8, or 5¾. It will be noticed also that columns 2 and 3 are
interchangeable.

To use the apparatus in connection with the table: Find the length of
the desired oval in the first column of the table, and the width most
nearly corresponding to that desired in the third column. The
corresponding number in the middle column tells which hole the needle