and the Storage of Water. 
47 
runs, is all raised by wind-mills from wells averaging about 
38 feet deep. 
Wind-engines with self-regulating circular sails, so, con- 
structed as to be secure in a storm, are made of all sizes. One 
with a sail 6 feet in diameter is capable of working a pump of 
IJ-inch bore. A sail 15 feet in diameter is equal to about 
1-horse-power, and costs 50Z. Gearing and a shaft for horse or 
pony to supplement the wind may be worked in connection with 
these engines, but this is unnecessary where a tank or reservoir 
can be provided of sufficient capacity to hold three or four days' 
supply. The illustration (Fig. 9) shows one of Warner and 
Fig. 9. — Warner's Patent Windmill, ivith Annular Sails, Pumps and 
Horse Gear. 
