VOYAGE TO MADAGASCAR* I4J 



very, Savery, in 1 700^ publifhed an account 

 of a fteam- engine, of which he pretended 

 to be the inventor. A defcription of it may 

 be found in Defaguliir*s Treat/fe of Nalurai 

 Phikjophj. Papin, almoft at the fame time, 

 conftruded a machine which produced the 

 hke effed j but Neucomen and Cawley, the 

 firft an ironmonger, and the fecond a gla- 

 zier, added feveral new improvements to 

 the invention of Savery, Neucomen*s ma- 

 chine (for it acquired the name of that able 

 artiflj was, and ftill is, employed in freeing 

 mines from water. Mr, Watt, a celebrated 

 mechanic, has lately brought this machine 

 to tlie hlgheft degree of perfetftion. 



The body of the machine confifts of a 

 cylinder of caft iron, the exterior part of 

 which is cafed with a covering of wool. 

 This cylinder is hermetically clofed, at the 

 upper extremity, by a cap with a hole in it 

 to receive the rod of the pi ft on. 



This 



