To know how to get the exact twist in yarn. Have your roll belt
tight, and band also. Count the revolutions of the spindle to the
rollers once. Divide that by the circumference of the roll, which is
3-14/100 inches. Example. Say 86 turns to the rolls once. (3-14/100)
86.00 turns, (27-38/100) twists to the inch.

WEIGHT ON TOP ROLLS.

38. To know the weight on top rolls. You must measure the distance
from where the stirrup is attached to the lever to where the wire is
attached that holds the weight; then multiply the distance by whatever
the weight weighs, and divide that product by the exact distance from
where the lever is attached to the set screw, to where the stirrup is
attached.

SQUARE ROOT TABLE FOR THE TWIST OF YARNS.

39

/$
+--------+--------+--------+--------+--------+--------+
| No. of | Square | No. of | Square | No. of | Square |
| Yarn | Root | Yarn | Root | Yarn | Root |
+--------+--------+--------+--------+--------+--------+
| 1 | 1.000 | 31 | 5.567 | 61 | 7.810 |
| 2 | 1.414 | 32 | 5.656 | 62 | 7.874 |
| 3 | 1.732 | 33 | 5.744 | 63 | 7.937 |
| 4 | 2.000 | 34 | 5.830 | 64 | 8.000 |
| 5 | 2.236 | 35 | 5.916 | 65 | 8.062 |
| 6 | 2.449 | 36 | 6.000 | 66 | 8.124 |
| 7 | 2.645 | 37 | 6.082 | 67 | 8.185 |
| 8 | 2.828 | 38 | 6.164 | 68 | 8.246 |
| 9 | 3.000 | 39 | 6.244 | 69 | 8.306 |
| 10 | 3.162 | 40 | 6.324 | 70 | 8.366 |
| 11 | 3.316 | 41 | 6.403 | 71 | 8.426 |
| 12 | 3.464 | 42 | 6.480 | 72 | 8.485 |
| 13 | 3.605 | 43 | 6.557 | 73 | 8.544 |
| 14 | 3.741 | 44 | 6.633 | 74 | 8.602 |
| 15 | 3.872 | 45 | 6.708 | 75 | 8.660 |
| 16 | 4.000 | 46 | 6.782 | 76 | 8.717 |
| 17 | 4.123 | 47 | 6.855 | 77 | 8.774 |
| 18 | 4.242 | 48 | 6.928 | 78 | 8.831 |
| 19 | 4.358 | 49 | 7.000 | 79 | 8.888 |
| 20 | 4.472 | 50 | 7.071 | 80 | 8.944 |
| 21 | 4.582 | 51 | 7.141 | 81 | 9.000 |
| 22 | 4.690 | 52 | 7.211 | 82 | 9.055 |
| 23 | 4.795 | 53 | 7.280 | 83 | 9.110 |
| 24 | 4.898 | 54 | 7.348 | 84 | 9.165 |
| 25 | 5.000 | 55 | 7.416 | 85 | 9.219 |
| 26 | 5.099