SQUARE ROOT.
30. Square Root of numbers from 18 to 30.—These twists are within a fraction.
| NUMBERS | SQ ROOT | Warp Twist | Filling Twist |
| 13 | 3.605 | 15 per inch | 11-½ per inch. |
| 14 | 3.741 | 15-½ per inch. | 12 per inch. |
| 14 | 3.741 | 15-½ per inch. | 12 per inch. |
| 18 | 4.242 | 19 per inch. | 15 per inch. |
| 19 | 4.359 | 19-½ per inch. | 15 per inch. |
| 20 | 4.472 | 20-½ per inch. | 15-½ per inch. |
| 21 | 4.582 | 21 per inch. | 16 per inch. |
| 22 | 4.690 | 21-½ per inch. | 16-½ per inch. |
| 23 | 4.796 | 22 per inch. | 17 per inch. |
| 24 | 4.899 | 22-½ per inch. | |
| 25 | 5.000 | 24 per inch. | 19 per inch. |
| 26 | 5.099 | 24-½ per inch. | |
| 27 | 5.196 | 25 per inch. | 19-¾ per inch. |
| 28 | 5.291 | 25-½ per inch. | 21 per inch. |
| 29 | 5.385 | 26 per inch. | |
| 30 | 5.477 | 27-½ per inch. | 22 per inch. |
DRAUGHT FOR YARN.
31. To know the draught for any number of yarn. Write the number you are spinning or want to spin, add two ciphers to it; divide that by the hank roving that you are spinning from, to get draught. Example; hank roving 225, No. yarn 18. Add two ciphers, (1800); divided by 225 gives 8 draught.
GEAR REQUIRED.
32. This is the way I was taught to figure draughts of different numbers of yarn. If you want to run another number with the same hank roving, multiply the smallest draught change gear by the number you are spinning, and divide that by the number you want to spin, and that will give you the gear required.