Butt and Co.—Fire lighted at 5h. 55m. 10s.; started engine at 6h. 9m. 20s.; repeatedly stopped from slide valves not acting, and stopped entirely at 6h. 46m., from cylinder cover breaking.
Easton and Amos—Fire lighted at 2h. 2m. 35s.; gauge moved 2h. 10m.; started engine at 2h. 15m. 5s.; pumps primed, worked till 2h. 54m. 5s.; stopped to shift plungers; went to work again, and stopped entirely at 3h. 35m. 10s., from two fire bars falling out.
Nichols (Manhattan)—Fire lighted at 10h. 51m. 14s.; gauge moved at 10h. 59m. 20s.; drew water directly; steam up to 140lbs. at 11h. 8m. 45s.; stopped two minutes; started again; made a few revolutions, and fly-wheel broke.
FOURTH TRIAL
Vertical Jet against Tower.
| No. | Name. | Size of Jet. | Greatest Height Thrown. |
| 1 | Shand & Mason | 22/16 | 180 ft. |
| 2 | Merryweather & Son | 26/16 | 180 ft. |
| 3 | Roberts | 14/16 | 150 ft. |
| 4 | Lee & Co | 21/16 | 55 ft. |
Gray's engine lighted fire at 7h. 7m. 40s.; steam 9lbs. at 7h. 17m. 0s.; got to work at 7h. 23m. 40s. to blow fires; at 7h. 27m. 0s. water through hose. Owing to some of the pipe connected with the steam gauge breaking, no further experiments could be made.