(754) . . 
Hiftoriam lapidum fingulari figurS infignium, quos in 
fua province nafci comperit ; expe<2are juffit. 
19. Maxilte pifcis fragmentum lapideum cum adna- 
iisBufonitibus. Garvordiae inventum. 
ao. Glojjopetra exigua cum mandibufce fragmento Ia- 
pideo adnato. Faringdon. 
At vero ad metam inopinato pervenimus, jam nihil 
amplius adjiciendi eft locus : & te forfan diutius quam 
par eft, hoc uno argumento detinui; quamvis gratifii- 
mum efle jamdudum comperi. Vale (vir Ornatiflime) 
amicorum quacunque terrarum non immemor. 
Oxonii\ 20 Aprilis, 
1 6 9 3- 
IV. The ExtraB of a Letter from Mr. Anthony 
Van Leuwenhoek , S. K. S. to the R. Soc. 
containing federal Observations on Cinnabar 
and Gunpowder. 
HAving with the greateft nicenefs examined native 
Cinnabar, \ could difcover therein nothing worthy 
noting; wherefore I gave it a very ftrongFire,upon which 
it fbon began to move, many, fmall Particles feparating 
themfelves from the reft, till they had crept into a 
cooler place and notwithftanding the great Weight 
of ^Cinnabar, yet (everal considerable Particles as big 
as Pins Heads role up from the Fire, and got into cooler 
places. When the Heat was encreas'd, the Cinnabar 
began to evaporate, a black Smoak arifing, made up of 
fmall 
