of Mathematical Learning. 



made this Difcovery important, and yet they 

 did not do it ; and if they had fpent a little 

 more time upon a Curiofity which feem'd ufelefs 

 to them, the Latent ufe of it had foon appeared. 



Let us always make a Collection of Mathema- 

 tical and Phyfical Truths ; happen what it will 

 we can't hazard much by it. It is certain, that 

 they (hall be drawn from Springs, whence a great 

 many ufeful ones have already been drawn. Wc 

 have reafbn to prefume, that we fliall draw from 

 thence, (brae that (hall fliine as Coon as they are 

 difcover'd, and convince us of their Ufefulnefs. 

 Other Truths fliall flay fbme* time till a piercing 

 Meditation, or (bme happy Accident difcovers their 

 Ufe. Some Truths being confider'd by them- 

 felves fhall be barren, till they arc confider'd 

 with reference to one another. Laftly, let the worfc 

 come to the worfe, (bme fliall be eternally ufelefs. 



I mean ufelefs with reference to (enfible and 

 grofs Ufes ; for otherwife they fliall not be (b. 

 An Object upon which alone you caft your Eyes 

 is the clearer and brighter, when the neighbouring 

 Objects, which however you do not look upon, 

 are alfo enlightcn'd ; becaufe it hath the Benefit 

 of the Rays, which are reflected from them. Thus 

 thofe Difcoveries, which are palpably ufeful,and de- 

 fcrve our chiefeft Attention, are in (bme meafure 

 enlighten'd by thofe, which may be calPd ufelefs. 

 For all Truths make one another more lucid. 



It is always ufeful to have right Notions, even 

 of ufelefs Subjects, And tho' we cou'd reap no 

 benefit by the Knowledge of Numbers and Sines, 

 yet it wou d ftill be the only certain Knowledge 

 granted to our Natural Light, and they wou'd 

 fcrveto give ourReafon the firft Habit of and lncli? 



a 4, nattor* 



