CRESSY DYMOCK. 99 



His promises amount to an assurance that all mills of 

 ordinary construction will be superseded by his won- 

 derful discovery. 



We naturally ask, therefore, had three years' experi- 

 ence taught Hartlib that there was some fallacy in the 

 new scheme, that it was too much like a perpetual 

 motion of the old order, obliging him in consequence 

 to declare that he was weary of such offers of doubt- 

 ful improvement. 



As Hartlib paid several writers, who were in reduced 

 circumstances and engaged on works of which he 

 defrayed the pubhsliiug expenses, Cressy Dymock 

 may have been one of this class of humble, yet 

 educated and informed authors j which would explain 

 Hartlib^s expression, "I should be willing to part 

 with him, provided that sending him to Sweden would 

 better his fortune.^^ That he was in some* esteem 

 we gather from Hartlib designating him '^ honest Mr. 

 Dymock."* 



In the absence of better information we can only 

 judge of his invention of Engines of Motion by the 

 context, which associates them with schemes for " per- 

 petual motion ;" but by what means he supposed he 

 had attained it he wisely and prudently reserves, as too 

 startling and too likely to stop instead of creating 

 inquiry. The evasion of direct allusion to the mecha- 



* Boyle's Works, 5 vols. fol. 1745. Vol. 5th, p. 264. 



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