fubfejiing between the Arts. 79 
immediately as they come from the mill-ftone. 
For this ingenious invention, Mr. Mills got a 
patent, the term of which is now, probably, 
expired i for the perfon who fhewed it me, 
informed me, that he had himfelf applied the 
Cylinder, with little variation, in fifting gunpowder, 
Jnuff, tanners' bark , and fand. So that, by this 
fimple, but beautiful difcovery, the dealers in all 
thofe various articles have reaped already con- 
flderable advantage: and how far the advantage 
may Jiill be extended, is as yet unknown. The 
power of Steamy in producing effe&s, to which 
hardly any powers of mechanifm are equal, has 
been long obferved, in the Fire-Engines , in the 
conftruction and application of which, Philofophy 
has lent her aid to Art^ and Science has become 
the tutor, and guide of Genius. But we have 
not heard, till lately, that this adlive and potent 
principle has been applied, in any other inftances; 
though there are many, in which a principle fo 
powerful, and, it is prefumed, fo manageable, 
would be of unfpeakable advantage. The exten- 
fion of it to machines, for Jfinning cotton, and for 
grinding corny is now, I am informed, under the 
contemplation of different Artifts; and, if cir- 
cumftances favour the execution, will, probably, 
be accompli (lied. * 
* A machine for fpinning cotton has now been worked, 
for fome time, upon this principle, at Manchefter. And 
the other, for grinding corn, is faid to be in confiderable 
forwardnefs, near Black-fryars bridge, London. 
That 
