of Mathematical Learning. 



yet lefs fenfible of the Genius that prefided over 

 the Undertaking ; and the World is the better for 

 its fucceeding well, but not altogether free from 

 Ingratitude. 



Anatomy, which is fbme time fince fo carefully 

 ftudy'd, can't become more exact, but Chyrurgi- 

 cal Operations muft alfo be more fure. Surgeons 

 know this; but thofe who receive the Benefit of 

 their Art know nothing of it. And indeed how 

 mould they? They would be obi ig'd to compare 

 Old with Modern Surgery \ and this wou'd take 

 too much Time, and go againft the Grain : So> 

 that lince the Operation hath fucceeded well, they 

 do not think it material to know whether it had 

 fucceeded as well in another Century. 



It is ftrange that fo many things are before our 

 Eyes, and that we do not fee them. Your Han- 

 dycraft Shops are full of ingenious Works ; but 

 yet we hardly mind them : And very ufefui 

 and well contriVd Inftruments and Experi- 

 ments want Spectators, who wou'd be won- 

 derfully pleas 'd, wou'd they take the pains to 

 admire, them. 



If a Learned Society have made fbme Improve- 

 ments in Geometry, Anatomy, Mechanicks, or 

 any other ufefui Science, it muft not be expected, 

 that the World will go back to fo remote a Spring 

 to thank and applaud them for the Ufefulnefs of 

 their Productions : For it will be more eafie to 

 enjoy the Benefit of their Difcoveries and Im- 

 provements than to know them. The Determi- 

 nation of Longitude by the Satellites, the Dilco- 

 very of the DuBus Thoracicus t a more convenient, 

 and more exact Level, are not Novelties fo fit to 

 make a noife as a pleafant Poem, or a handfome 

 Piece of Oratory, 



