Srewart.— Establishment of a Sanatorium in Rotorua District. 488 
Water-power and applications.—Frequent allusion has above been made 
to water-power. The Puarenga in its course from the gorge to the lower 
level of Whakarewarewa furnishes means of obtaining probably 100 horse- 
power. This can be developed by several wheels or turbines, placed in 
convenient situations, and treated picturesquely in design. This power 
would be applied to various purposes, some of which have been already 
alluded to; these are,— 
1. The circulation of hot water in the hothouses: this need not be 
further dwelt on. 
2. Refrigerating machinery: this would be applied principally to the 
production of ice, the preservation of meats and fruits, the cooling of air, 
and water for sanatory purposes. Skating and curling rinks of ice could 
be always at command, and, as before mentioned, an artificial winter 
obtained for horticulture. 
3. Electric light: this would be easily obtained by dynamos driven by 
water-power, and storage in secondary batteries. A system of arc-lights for 
the grounds, and incandescent lamps for the interiors of the whole establish- 
ment would cost only the maintenance of dynamos and lamps. 
4. The working of cable tramways connecting the upper and lower 
establishments, and on other routes having much traffic. 
5. Pumping cold water to reservoirs situated above the level to which 
it would flow by gravitation, and also supplying the residences with hot 
water for house baths in special cases. 
Water supply for domestic purposes cannot be obtained in sufficient 
purity from the Puarenga, and would depend on one or more of remarkably 
pure and clear streams of spring-water. One of these, flowing perhaps 
one million of gallons per diem, is very conveniently situated for supplying 
Whakarewarewa. Another group of these streams at the foot of Ngongo- 
taha Mountain, on the north-west of the lake, will form the water-supply of 
the large Rotorua population in the immediate future. 
Branch Establishments.—It may be found necessary to have branches, or 
outlying lodges, at various points of interest, such as at the Pink Terrace, 
Rotoiti, Orakeikorako, etc. 
Hiring Department.—This might with advantage be attached to the 
scheme, and would comprise the management of all omnibusses, tramways, 
carriages of all kinds, hire of horses, donkeys, sailing and rowing boats ; 
guides, and the conduct of all excursions by land or water, and also sports, 
would be under this department. 
Extent of Grounds necessary.—On the township side of the Puarenga, the 
grounds should include the area of the flats and downs, extending to the 
line from Tangatarua to the crossing of the Puarenga by the Wairoa Road, 
28 
