392 Notice of the Revue Encyclopedique, §. 
This approaches very nearly 2 ol anon of water 
== 18 — five proportionals of Silex: = 
Geological and Geographical Situation. 
It occurs in cavities in massive and other varieties of sin- 
ter, and upon conglomerated masses of altered lava and 
pumice, in the vicinity of the hot springs of the island of 
Saint Michaels, (Azores) and has probably been deposited 
from the waters which held it in solution by their elevated 
temperature, aided by an alkali. 
56. Swainson’s Zoological Miscellany. 
Notice agrseng sa by Professor Rafinesque, in a letter 
ed Lexington, 10th October, 1820. 
. am requested by the author to have the following no- 
“Mr. William Sites bi Liverpool, a gentleman — 
has travelled in Brazils, here ltaly, Sicily, &c. was 
commence publishing in London, in October, 1820, a Zoo. 
logical Miscellany, with coloured plates. He is an able 
naturalist and painter, me nage which will renee his 
aor ed valuable. It i ede on the pilin: of the Zoolo- 
st. Notice oft _ Revue Epnenane ple in Paris 
pes Monthly cu has ie recenth uD to be 
known in this country. Indeed. ey a, only 
