- 146 -Steam pressure at boilers* ... ... lb. per square inch 78 Steam pressure at engine* ... ... lb. per square inch 56 Revolutions per minute ... ... ... ... ... 211 Average weir reading ... ... ... ... inches 10-0 Discharge of pump in gallons per minute ... ... 6,180 Discharge of pump in cubic metres per hour ... ... 1,685 Total lift of water ... ... ... ... feet 9.5 Water Horse-power ... ... ... ... ... 17.8 Fuel fired per W.H.P. per hour ... ... lb. 16.7 Cost per W.H.P. per hour ... ... milliemes 22.4 Cost per 1,000 m³ water delivered ... ... milliemes 236 A third trial was held on October 24th, 1914, to determine the steam consumption together with efficiencies of engine and pump. The total efficiency of pump and engine was only 35 per cent., accountable for by the comparatively low speed of engine which was only at about half load.

The pump, too, was running much below speed, and working at about one-third the lift for which it was designed.

An improvement in the figure was expected with the fall of the river, though it was not thought that under the most favourable circumstances the efficiency would exceed 60 per cent.

The engine performance as represented by the figure 45.8 is, of course, high, partly for reasons enumerated above, and partly because it included all condensation, steam jacketing and other losses between engine and boiler, which, strictly speaking, ought not to be laid to the account of the engine, but which were included owing to difficulty of measurement.

The performance of the boilers may be regarded as fairly satisfactory, but could be considerably improved, though skilful firing by native stokers is almost unobtainable.

Third Trial of Plant No. 2. Shambat.

Date ... ... ... ... ... October 24th, 1914. Duration of trial ... ... ... ... ... 4 hours. Kind of fuel used ... ... ... ... Wood. Steam pressure at boilers ... ... lb. per sq. inch 79 Steam pressure at boilers ... ... lb. per sq. inch 57 Vacuum ... ... ... ... ... inches 14 Indicated Horse-power: -High-pressure cylinder ... ... ... 33.7 Low-pressure cylinder ... ... ... 29.7 Total ... ... ... ... ... 63.4 * With regard to the large discrepancy of steam pressure at boilers and engine, it was afterwards found on testing the new gauges that both were unreliable.