184 THE miners' PRIEJn). 



and you were pleased to approve of it. Since which I have 

 met with great Difficulties and Expence, to instruct Handi- 

 craft Artificers to forme my Engine according to my Design ; 

 but my Workmen, after so much Exjierience, are become 

 such Masters of the thing, that they oblige themselves to 

 deliver what Engines they make me, exactly tight and fit 

 for Service, and as such I dare warrant them to any Body 

 that has occasion for them. 



Your kindness in countenancing this Invention in its first 

 Appearance in the World, gives me hopes the Usefulness of 

 it will make it more acceptable to your Honourable 

 Society, as they are the most j)roper Judges of what 

 Advantage it may be to Mankind. And it would be 

 ungrateful in me not to make use of this Opportunity to 

 return you my most humble and hearty Thanks for the 

 Honour and Favour you did me in Approving my Design, 

 and * publishing it to the World ; which shall be always 

 acknowledged by 



Your most obliged 



and most humble 



Servant, 



ThO. S AVERY. 



TO THE GENTLEMEN ADVENTUEEES IN THE 

 MINES OF ENGLAND. 



I am very sensible a great many among you do as yet 

 look on my Invention of raising Water by the impellent force 

 of Fire, a useless sort of a Project, that never can answer my 

 Designs or Pretensions ; and that it is altogether impossible 

 that such an Engine as this can be wrought under-ground, 

 and succeed in the Raising of Water, and Lreining your 

 Mines, so as to deserve any Incouragement from you. I am 

 not very fond of lying under the Scandal of a bare Projector, 

 and therefore present you here with a Draught of my Machine, 

 and lay before you the Uses of it, and leave it to your 

 Consideration, w hether it be worth your while to make us 

 * Philosoph, Transact. Numb. 252. 



