XVI. T. H. HOUGHTON. 



an empirical formula for ascertaining the power that can be 

 obtained from a flowing bore when the quantity of water 

 discharged, and the pressure in the bore when the flow is stopped 

 quickly are known. The results mentioned as obtained in America, 

 as a rule, show that more power is obtained than Mr. Henderson's 

 formula would indicate, but it may be that different geological 

 surroundings affect the case, for he adduces the case of the 

 Winton bore, where, according to the formula, 13-5 h.p. 

 should have been obtained, and the experimental determination 

 gave 1396 h.p., showing that the formula closely coincides 

 with the results obtained. Applying Mr. Henderson's formula 

 to some of the bores in this colony, I find that in one instance 

 the potential energy is capable of developing 84 h.p. ; even 

 allowing a large margin for overstatement of the flow, it 

 may be safely assumed that 50 h.p. could be continuously 

 developed day and night ; and from two other bores, where I 

 understand the flow has been gauged with some accuracy, more 

 than 20 h.p. can be obtained in each case ; these three bores are 

 not far from townships. Many of the other bores are capable 

 of providing from 5 to 16 h.p. 



Professor Unwin in his lectures on the " Transmission of 

 Power," delivered before the Society of Arts in 1893, estimated 

 the cost of producing 10 h.p. in a small engine working for 1000 

 hours per year as ,£114, or if working 3000 per year as £207, so 

 that if only 10 h.p. can be utilized for 6000 hours a year by some 

 method of storage, either compressed air or electricity, the value 

 would be nearly £400 a year. I believe it can be safely 

 assumed that the flow from an existing bore is not likely to be 

 prejudicially affected by another one in its immediate neighbor- 

 hood, so that for the production of power,- bores could probably be 

 put down in a locality having a good flow and a pressure suffi- 

 cient to warrant the expectation that the required power could 

 be developed. 



The difficulty of storing and transmitting this power would 

 probably be best met by means of compressed air transmission, 



