C * ] 
PHILOSOPHICAL 
TRANSACTIONS. 
I. Tdhe greatejl EffeEi of Engines with uni - 
forndy accelerated Motions confidered. By 
Francis Blake, Efiq\ F.R.S. * 
Read June 24, f | \ H E writers, I have met with, 
17 j6 ‘ I upon the maximum of Engines, 
-®* or the greatefl effed poffible in 
any given time, have fuppofed the working parts of 
the machine to retain their diredion, and be uni- 
formly moved by the force of a current. They 
have therefore confidered only the cafe of an uniform 
Rotation, as in the adion of grinding ; where the 
impediments and impulfes being brought to a ba- 
lance, the impulfes are but fufficient to prevent a 
decay in the generated motion. And, upon that 
view of the Problem, the load of an Engine, when 
* The diftance of time betwixt the reading of this paper, and 
its now appearing in the Tranjaftions, was owing to the abfence 
of the author, and his defire to reconfider it before it went to 
the prefs. 
Vo l. LI. 
the 
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