( *01 ) 
the Oriental ones; only it was obferved, that thofe 
Diamonds that lay more faperficially, and expofed to 
the Air and Sun were more fcurfy, and by Confequence 
loft more by polilhing than the other. 
SIR, 
Tour mojt obliged humble Servant, 
, • 
Jacob de Sarmento. 
IV. Viri Cekbenimi Johannis Marchionis Po- 
leni, vS. 5. ad Yirum Docliffimum Jaco- 
bum Jurinum, M. D. 5. 5. Epiftola, 
qua. continetur Summarium Obfervadonum 
Meteorologicarum per Jexennmm Patavij ba- 
- hitarum. 
J A M ante viginti ferme annos coeperam Meteorolo- 
gfcas Ephemerides ex obfervationibus rneis, hie 
Patavij, confcribere ; plures tamen in adverfariis 
meis inerant lacunae (varias ob cauftas, praefertim 
quod faepe ab urbe abeffe cogerer) visa autem Invi- 
tatione tud , Ornatiflime Vir, ad Obfervationes Me- 
teor ologic as communi conftlio injlituendas , quam 
Londini Anno hujufee feculi vigefimo quarto edidifti, 
rem inpofterum diligenter curare inftitui ad exemplar, 
quod eadem in Invitatione dedifti ; domefticamque fe- 
D d dulara 
