172 
On Irrigation in Tasmania . 
45 , per acre per annum : there are situations in the colony 
where a channel costing £400 would water much more 
than that extent. 
In channels from the smaller rivers, an outlay of £600 
upon a channel 3 yards wide at the head and 3 miles 
long, including a regulating sluice, &c., might supply 600 
acres, or at the rate of £1 per acre in first outlay, and 2.s\ 
per annum; and if the cost of a tank was to be added, 
it would amount to 25. 6d. per acre for the water. 
Cost of Pumping .—The weight of a cubic yard of 
water is about 1700 lbs.; and supposing it to be raised 30 
feet high, one horse power of steam would raise about 30 
cubic yards per hour; and if the engine is worked twelve 
hours per day, that power would raise 360 cubic yards, 
or sufficient for rather more than 22 acres. The cost 
and expense of a ten-horse engine in this colony may be 
estimated as follows :— 
£ 
First cost putting up, &c. 600 
Pump and buildings. 150 
£750 
Interest on ditto at 10 per cent. 75 
Wear and tear of engine at 8 per cent... 60 
Repairs.. • • 30 * 
£165 
Superintendent, half a year. 50 
Fuel—3 tons per day, or, for 180 days, 
540 tons at 2s. 6d . 70 
£285 
Annual expense for 220 acres 
Or per acre, £1 6s. 
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