THE miners' FRIEI^D. 207 



his Servant tauglit it, it being to he learnt in a very sliort 

 time Ly one of an Ordinary Capacity. 



Jl/iicr. But there are Peoph;> who pretend to do great 

 things in the Improvement of Mtf/fnes to work hy Mund or 

 Hurscs, the Hope and Expectation of which has hindred 

 some of Us in our Work, and tired others, so as to make 

 them ont of love witli all Engines, and almost with the Trade 

 of Mining. And tliough I wish the contrary, I fear this 

 may prove some hinderance to the promoting your Interest. 



Author. True, Sir, I own that Time out of Mind tliere 

 have been IMountebanks, and Impof<torK in all Faculties, 

 who preiend to (Treat things, but do perform Nothing 

 effectually. And it would be hard if that should be 

 drawn into Consequence, That because some are Knaves, 

 therefore none are Honest. I know the Notions of the 

 Per pet lied Motion^ or Self-moving Engine, and many such 

 like Whims are pretended to l)y Designing Men, and Tielieved 

 by Ignorant Ones : But the Judicious Man, who considers 

 the Latcti of Motion, knows it is an Infallible Rule, That 

 whatsoever ^Fatter is to be removed upward, must have a 

 Force superiour to the loeiglit to be lifted up. If its Motion 

 be recjuired as m-ift as i\\e Motion oi the Moving Cause; if 

 slower, i^roportionably less strength wiU do; if swifter, then 

 the Moving Cause, as Mens Hands, Horses, or Dead Weight, 

 then must the Strength of the Moving Cause be Increased 

 proportionably, or no Motion can be produced. And the 

 Experience of Ages shows us this, to be a most sure Rule, 

 allowing for Friction, which is larger, the more TJl/eels or 

 Parts an Engine consisteth of ; and of Consequence, the 

 fewer Parts or IF/ieels an Engine consisteth of, the easier it 

 Works : So that by barely looking on a Pump, if it has 

 more Parts or JJlieels then the Common CremJc-vfOvk, you 

 may conclude it worse ; if a Chain-vfork or Tuh--woYk the 

 same. So that all that can be Expected, is to make those go 

 Easier then they are now made to go by Ingenious Work- 

 men, expert in making them. And if you try how small a 

 Matter will move those Engines, when not Loaded with Water, 

 you will find the Friction so small, as not worth any mending, 

 could it be done, especially the Tuh-Gin, whose Friction 



