364 AGalt;U^LTURAL ilUSEUif 



become free to he patented by any one who could make 

 the discovery, so useful, and so much wanted. 



Tbey have, however, abandoned their tube boilerg, 

 which they patented one year aftet* my principle had 

 been steadily in useful operation, and have followed me 

 and copied my engine, so exactly, that they have the 

 identical same form of boiler, consistin*^ of cylinders of 

 strong sheet iron, 3 feet G inches diame'er 1<S feet long-, 

 to contain the water and steam, with Hues to puss the 

 fire through them, that i( may generate the more steam,, 

 and save fuel. This being the form recommended by 

 me in my book, explaining the principles, and the ap- 

 plication of my im})rovements. They also apply a 

 forcing pump, which becomes necessary in using the 

 principle, to supply their boilers with water, so that 

 they have my form of engine in upc, and are prepared 

 to use my patented principle also when tliey need it, and 

 can by these means treble their present power with 

 safety, when they please, which will enable them to as- 

 cend the Mississippi 50 or GO miles a day, by day light, 

 and to excel all other steamboats with engines of equal 

 dimensions. 



I do not know whether they mean to infringe my pa- 

 tent right in full, or to obtain my licence to use my prin-« 

 ciple, which (to encourage the enterprize ) I would 

 grant at a low price. 



I have, at great labour and expense, prepared my 

 works to construct my engines, for those who may want 

 them for any and every purpose, and if there was no- 

 thing else to recommend them, their simplicity is well 

 worthy of notice, they do not use more than 1 40th or 

 1 .50th part the water, ajid consume much less iuel than 

 others, are less liable to be impan*ed, are easier under 

 stoud and attended, occupy less room, and vvili apply to 

 every purpose for which steam eu'i^ines are uselul, and 

 when applied to boats, will pass all other steam boatS; 

 as they now pass row-boats, 



OLIVER KVA.N>6i 



