Height of the water above the weir by the hook gauge.
Observed by Mr. Daniel Haeffely.
| Time. | Height, in feet. | Time. | Height, in feet. | Time. | Height, in feet. | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| H. | min. | sec. | H. | min. | sec. | H. | min. | sec. | |||
| 4. | 57. | 5. | 1.8710 | 5. | 1. | 10. | 1.8690 | 5. | 4. | 35. | 1.8730 |
| 58. | 15. | 1.8710 | 1. | 45. | 1.8700 | 5. | 50. | 1.8725 | |||
| 58. | 50. | 1.8720 | 2. | 15. | 1.8720 | 6. | 25. | 1.8725 | |||
| 59. | 20. | 1.8730 | 2. | 50. | 1.8720 | 6. | 55. | 1.8725 | |||
| 59. | 50. | 1.8715 | 3. | 15. | 1.8715 | 7. | 20. | 1.8720 | |||
| 5. | 0. | 15. | 1.8715 | 3. | 40. | 1.8715 | 7. | 45. | 1.8715 | ||
| 0. | 45. | 1.8705 | 4. | 5. | 1.8730 | ||||||
Note. The zero of the hook gauge was 0.002 feet below the top of the weir.
Direction of the water leaving the wheel.
Observed at the vane index by Mr. John C. Woodward.
| Time. | Direction. | Time. | Direction. | Time. | Direction. | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H. | min. | sec. | deg. | min. | H. | min. | sec. | deg. | min. | H. | min. | sec. | deg. | min. |
| 4. | 57. | 0. | 59. | 0. | 5. | 1. | 0. | 57. | 0. | 5. | 5. | 0. | 58. | 0. |
| 30. | 57. | 0. | 30. | 59. | 30. | 30. | 59. | 30. | ||||||
| 58. | 59. | 0. | 2. | 58. | 0. | 6. | 59. | 30. | ||||||
| 30. | 58. | 0. | 30. | 57. | 0. | 30. | 57. | 0. | ||||||
| 59. | 58. | 0. | 3. | 60. | 0. | 7. | 59. | 0. | ||||||
| 30. | 58. | 30. | 30. | 58. | 0. | 30. | 57. | 30. | ||||||
| 5. | 0. | 57. | 0. | 4. | 59. | 0. | 8. | 59. | 0. | |||||
| 30. | 57. | 30. | 30. | 56. | 0. | |||||||||
Note. When the vane pointed in the direction of the radius of the wheel, the reading of the index was 90°. 0° was in the direction of the motion of the wheel.
50. Previously to the commencement of the experiments, the apparatus for measuring the useful effect was carefully adjusted. The bell crank was balanced when there were no weights in the scale. For this purpose the link M, figure 3, plate IV., was removed, and the chamber of the hydraulic regulator filled with water; — weights were then applied to the top of the bell crank, near the end to which the hydraulic regulator was attached, until the whole was in equilibrium; — the final adjustment was made, by placing a weight of about two pounds at the extremity of one of the horizontal arms of the bell crank, — the arm was retained horizontally until a signal was given, when it was left at liberty to
descend, and the time occupied in descending a certain distance was noted; — the weight was then removed to the extremity of the other arm, and the same process repeated. The balance weights were altered until the times of descent
