Intelligence and Miscellanies. 203 
tate of lead. An action immediately commenced, on slight- 
ly warming the fluid, and a copious precipitate of sulphuret 
of lead ensue 
The difference in magnetic properties between the mete- 
oric proto-sulphuret of iron and the same mineral belonging 
to our globe, led M. Rose to examine the former for nickel ; 
conceiving that as the sulphuret of nickel of Johann Geor- 
genstadt is not magnetic, a portion of this metal combined 
with our mineral, might perhaps be the cause of its not af- 
fecting the needle. He was unable, however, to detect the 
smallest trace of nickel in the pyrites of the Stannern stone. 
Nevertheless, as the common magnetic pyrites possesses but 
feeble and very variable degrees of magnetism, the slight dis- 
crepancy here observed between the two substances in ques- 
tion, does not — in any force with the idea of their 
specific agreemen 
Yale College, ose 20, 1829. 
19. Native Soda Alum, in Milo. 
Mr. George Jones, at present, a tutor in Yale College, and 
recently returned from the Mediterranean, brought with him 
among many other valuable minerals, a rich case of alum sp 
cimens from the ancient locality of Milo aaa which he has. 
ad the kindness to present to the cabinet of this ONES: 
The following is a memorandum of the circumstances 
which it occurs as observed by himself, and with which be 
has favored me to be inserted in this place, in connexion 
with remarks I have to offer concerning its nature. 
alum comes from two places in the island of Milo. 
One of fie is upon the south west side of the island, called 
by the natives Calamo, where it occurs near to the shore in 
a cave, above which rises a steep hill consisting of a decom- 
posing lava of various colors, and strongly imprognates with 
suinhur. The cave is about twelve feet deep and five feet 
high, and is completely lined upon its ee with The 
bottom of the cave is composed of a loose earth th 
which is constantly rising heated Shana air, which dur- 
ing its passage through the crevices precipitates the most 
brilliant nee of oe is In front of the cave is a hot 
spring, and near by, are other caves, in none of w ich, how- 
ever, the fermation of eae) is at present taking place. 
