112 



incapable of being carried on to the grinding of Corne 

 or sucli strong works : For, The Brewers Mills (the 

 best or greatest, I mean now used in London) move 

 by the strength of 4. horses, under a wheele of 24. 

 feet diameter, which may contain at 4. inches pitch 216 

 cogs, the horses path is not above 18. feet, so that the 

 Cog-wheel over-hangs one further part, these Horses 

 one time with another, draw not above 112 pound 

 weight apiece at most, and move (at most 3 times about 

 in a minute, the whole strength of the 4 is 448. Out of 

 which deduct one 4th part, there remains 336. And 

 216 Cogs is 648 Cogs at work in a minute, these work 

 upon a stone of 4 foot, it may be 4 and a halfe, by a 

 trundle of one foot, or 9 staves at the same pitch, (if 

 of 10 staves it goes stronger but slower) by this account 

 72 is the respective number of turnes, the stone runs 

 about in a minute. 



Note that if this Mill were to grind Wheat with the 

 same stone, it could not move by this trundle, nor 

 with this strength, and a large trundle would not 

 turn the stone so oft in a minute, whereas my Engine 

 prepared for Wheat, wiU bring at least twice so much 

 strength with the Cogs, yet turne the stone at least 

 72 times in a minute. 



Let this serve as a scale to measure all other Appli- 

 cations by ; for what ever wil hold in grinding Wheat, 

 will hold (to give the advantage to my Engines) much 

 more in any other Application, and particularly for 



