PRELIMINARY CONSIDERATIONS. 7 



SECONDARY ACTION RAM. 



Another good source of water-supply, personally 

 tested, and not found wanting, is the hot air-engine, 

 invented by Mr. A. K. Rider, of New York, and made 

 by Messrs. Hay ward, Tyler & Co., of 39, Queen 

 Victoria Street, E.G., Luton, etc. This engine, though 

 of course not self-acting like a ram, is very certain 

 easily kept in good order by any man used to the 

 simplest machine, and goes for some time, if well 

 stoked, without attention. On the whole, perhaps, it 

 will be found better to work such a machine applica- 

 ble for any of the needs of water-raising, to those of 

 the fish-house than to put any trust in a ram , although 

 the improved ram is a very valuable apparatus. 



