Simplicity, accessibility, and durability of parts.
LARGE CLASS.
FIRST TRIAL.
Delivering 1000 gallons into a tank at a true distance of 67 feet, and 27° from the horizon. Depth from which water was drawn, 4 feet 6 inches. The water in the boiler being cold when the signal was given to commence, each engine commencing to work on attaining steam pressure of 100lb. to the square inch.
| No. | Maker. | Weight. | Time of raising Steam to 100lbs. | Time of filling Tank. | Total Time. |
| T. c. q. lbs. | ' " | ' " | ' " | ||
| 1 | Easton & Amos, London | 2 18 3 12 | 13 14 | 6 16 | 19 30 |
| 2 | Merryweather & Son, London | 2 18 0 8 | 10 25 | 9 42 | 20 7 |
| 3 | Shand & Mason, London | 2 17 1 0 | 10 51 | 12 19 | 23 10 |
| 4 | Butt and Co., United States | 2 14 0 4 | 16 30 | 6 48 | 23 18 |
| 5 | Roberts, London | 1 19 1 4 | 11 40 | 20 24 | 32 4 |
| Nichols (Manhattan) United States | 2 10 1 4 | } Did not work. | |||
| Gray & Son, London | 1 18 1 4 | } Did not work. |
Merryweather and Son began to work at 100 lbs., fell directly to 40 lbs., and continued so throughout; stopped and steam rose to 130 lbs.
Shand and Mason—Suction-pipe choked; left off working about 2 minutes.
SECOND TRIAL.
Delivering 1000 gallons into tank at same distance commencing with full steam.