LETTERS ON SCIENTIFIC SUBJECTS. 77 



somewhat howe to make them. Who that is that makes those 

 excellent glasses in England, I know not. I should have 

 guessed him to have bin Hammilton, who was generall of 

 the artillerie to Leslei, but you write him Haman, whom I 

 have not heard of, but I hope heereafter wee may procure one 

 of them. I am sorie Calvusius cannot be had, I shall not 

 yet trouble you for the other, but returne you manie thankes 

 for your inquirie of them. I am now growne into some 

 aquaintance with Doctor Jungius, who is pleased to visit me 

 commonlie twice a weeke, and to irnparte to me some of his 

 conceptions de motu locali ; wee are yet but in the definitions, 

 which are verie well expressed ; he hath allso imparted to me 

 divers theorems on the same subject, but not demonstrated 

 them, but I doute not but he can and will, after he hath laied 

 foundation enough in definitions and axiomes to builde upon. 

 I am sorie 1 lost so much time before I was aquainted with 

 him, but I shall endevoure to redeeme it during my staie 

 heere. And so hoping to heare shortelie from you, and wissh- 

 ing you all happiness, I rest 



Your assured friend to serve you, 



CHARLES CAVENDYSSHE. 



SIR CHARLES CAVENDISH TO JOHN PELL. 



[MS. Birch, Brit. Mus. 4278, fol. 177, Orig.] 



Antwerp, March 26, olde style. 



Worthie Sir, Not to trouble you with more particulares 

 of oure journei than that at Rotterdam Sir William Boswell 

 came to us, whom I found to be that which I supposed him 

 formerlie to be, a discreete, civill gentleman. I perceive he 

 thinkes Monsieur de Cartes his last booke to be full of fancie, 

 though he esteemes much of him. Heere I mett with Sir 

 Kenelm Digbie's booke, but had no time to reade it all ; but 

 it apeares to me to have some things in it extraordinarie. 

 Wee met heere with the famous Cappuchin Rieta, his booke 

 is nowe in the press heere allmost finished. Hee solves the 

 aparences of the planetes by excentricks, without aequants or 

 epicicles, and yet not according to Copernicus system of the 

 worlde. He teaches allso in this booke the making of his 

 newe tellescope ; his tube for his best glass was spoiled so that 

 wee could not see it, but wee sawe another made by his di- 

 rections, but had not the oportunitie of looking at a conve- 

 nient object far distant, but as I guess it is not better than 



