C 4'0 1 
norcli, and many others . The neighbourhood of Monte 
N novo, is alfo rendered interefting to naturalifts by its 
follil glafs, vitrum obfidianum plinii, pumex ^jttreus fo- 
Mus L I N N JE I , which is found in plenty under the weft fide 
of it, in a fmall valley, called Val San Zi bio, near the baths 
of San Bartolomeo. It exadly anfwers to the charaders 
given of it by linnveus and others; as may be feen by 
ibme fpecimens of it, which I havefent, and which were 
broken from a very large mafs. It abounds about the volca- 
nos of the Andes particularly; but I found none of it in Au- 
vergne, Velay, or the V eronefe or Viccntine vulcanic hills. 
Monte Gaftello, or the Caftle Hill, near Baon, at the fouth- 
eaft fkirt of the Euganean hills, and about half a league 
from Efte, affords another vulcanic concretion of a very 
remarkable ftruaure. This hill is moftly formed of huge 
oval and laminated malTes''^^, of various fizes, confufedly 
concreted together, like a pudding ftone, but in a vulca- 
* nic matrix, confifting of a fort of dark-brown ftone, with 
angular /^/)//// in it of a dingy-whitifti colour, and vifibly 
manifefting an affinity with the ordinary granite of the 
other neighbouring hills ; and perfeaiyTimilar to the fi- 
gured maffes concreted withdt. In other parts, and par- 
- ticularly at Monte Galda, a fmall ifolated elevation in the 
plain of Padua, between the Euganean and Vicentine 
hills, I have found thefe laminated maffes of a fpherical 
figure, in a broken cavity of a mixed vulcanic and ma- 
xine hill of Monte Galda,:I faw a group of thefe laminated 
xound balls regularly placed one above the other, and 
(a) Fig. 4. 
perpen- 
