(61) 
of the Superficies of the Earth, which at times fwells and 
rifes up a Yard high in the Form of a little Kill, and 
finks again, in a ftrange manner, &c. To this he adds 
feverai Stories of Eruptions of Vapours and Fumes out 
of the Earth, divers of them mortiferous : And Two 
Letters, the Firft about Petroleum, found in the State of 
Medena^ and a For ago ^ which oftentimes in a Year vo- 
mits out Smoak, Flame, and an Afti-coloured (linking 
Lome or Mud. The Second about an 0}i or Ballom 
found in a Well near Fiterho in Italy. 
The One and Thirtieth gives an Account of the Oy l 
of Juniper^ and the Natural Produdiions of the Territo- 
ry of the Duke of Parma. 
The Two and Tl;irtieth concerns the Glojfopetr^ of 
Malta, and other formed Stones, concerning the Origi- 
nal and Formation of which he embraces the Opinion of 
Columna, Steno and Scilla, that they were really the Parts 
or Covers of thofe Animals which they reprclent. He 
anfwers the principal Objection againft this Opinion, 
*viz. thole Cluflers and Lumps of Lenticular Stones of a 
Saffron Colour amafled together , which are frequent- 
ly found in Malta^ and of which we have fome very ele- 
gant ones ; which feem to be the Miner a or Ovarium of 
thofe Bodies they call Serpents Eyes,- thefe he fuppoles 
may be the Eggs of (bme Fifh, which produces or breedr 
■them in a little Ciftula or Bag; by which means they 
come to be united together in iuch Lumps .which is the 
beft Anfwer to this Objedion I have yet met with ; if 
at leafl: there be any Fifli which produces her Eggs in 
fuch a Manner. 
The Three and Thirtieth is about the Alternations of 
a certain Well xst^x ChamheryjmSm>oy^ much refembling 
the Viciffitudes of our Ebbing and flowing Well at Gig- 
gkfvoick in Torkjhire. 
I 
To 
