p?otjutttonofCaO^ n 



quifite manner, may recompofe a 

 prifm, whofe extreams fhair be too 

 blunt to be fit for the former ufe. 

 This may be alfo illuftrated by the 

 breaking of a dry ftick circularly cut 

 off at the ends, which though it is 

 unapt ? whilft intire and of that 

 bulk, to prick the hand 5 yet if it be 

 violently broken, the ragged ends 

 of it and the fplinters may prove ftifl^ 

 (lender, and (harp enough to pierce 

 and run into the hand : To which, di- 

 vers other fuch Mechanical IUuftra- 

 tions might be added. But, fince I 

 fear you think, as well as I, the main 

 conje&ure may not be worthy any 

 farther profecution, I (hall not infift 

 any longer on it. And becaufe the 

 hiftorical part of thefe Experiments 

 was for the main delivered by me al- 

 ready in the Eflay about the Analysts 

 and Redintegration of Nitre, I (hall 

 now proceed to other Trials. 



EXPER. 



