468 Experiments on the Fufion ofPlatina, 



as it would have been of the greateft con- 

 fequence in conftru6ting optical inftruments, on 

 account of its not being affefted by the air. I 

 do not defpair of fucceeding, as my intention is 

 to purfue this objeft ftill further, and I fhall 

 with pleafure communicate my future procelTes 

 to the public through your moft excellent 

 inftitution. 



I am. Sir, 



Your moft obedient, &c. 



THOMAS WILLIS. 



I OFFER the following experiments to the 

 public with a view to promote further refearches 

 into the properties of this extraordinary metal, 

 and in hopes that by rendering the method of 

 fufion better known, I may induce others to 

 purfue the objed fo far, as to be the means of 

 difcovering methods of making it malleable. 

 It was the appearance of fuccefs in Mr. Nowell's 

 two firft experiments that engaged me to try the 

 following procefles, and I hope they are defcri- 

 bed fo plainly, that any gentleman may readily 

 and eafily perform the fame, who has been 

 accuftomed to the common operation of fufions. 



I am 



