Intelligence and Miscellaneous Articles. 157 
tremity, and have kept the temple confined in a kind of 
Jake until a passage was opened, and restored the ground té 
its natural dryness?—There are difficulties attending all 
these explanations, particularly the two last. How could 
such important changes have taken place after the construc- 
tion of the temple, and have left no trace in history or in 
the memory of man? They frequently speak of the eruption 
in the year 1528, when the hill called Monte-Nuovo was 
formed, and when the sea invaded a part of the coast; but 
there is no tradition of successive revolutions. —Near this ~ 
temple has been discovered a particular variety of marble, 
of which M. Cubieres has read an analysis to the Institute, 
It is white, semi-transparent, and receives a fine polish ; it 
dissolves with difficulty in the nitric acid, and gives sparks 
with stecl; it contains 22 parts in every hundred of mag~ 
nesia. M. Cubieres has called it the Greck Magnesian 
Martle, and thinks it the same which the ancients made 
“use of to construct their temples without windows, that 
received light only through the transparent walls.—M. 
Daubisson has given an account of a mine of Jead near Tra- 
nowitz in Silesia, containing the ore called galena in a 
very extensive bed. It is found in rocks composed of 
shells, which Mr. D. thinks are of recent formation. To 
‘know really the age of the calcareous beds in which: the 
lead ore is found, we should determine the species of’ shells 
that they contain. + 
AXIX. Intelligence and Miscellaneous Articles. 
To Mr. Tilloch. 
Sir, Havine observed in a late publication of the first 
respectability, that the writer of the article on “ Freezin 
Mixtures”’ regrets that I have not given the specific gravities 
of the acids used in my experiments ; I beg leave to state, 
for the information of that gentleman, and others whom it 
may concern, that the specilic gravity of the sulphuric acid 
was 1°848; and that of the red fuming nitrous acid 1-510; 
both of which are thus given in a paper by me in the 
Philosophical Transactions for 17953 and in my Treatise 
on Artificial Cold, page 76. 
f take this opportunity of declaring my intention of pre- 
‘senting, through the medium of the Philosophical Maga- 
zine, some observations relating to the practice of Physic 
and Surgery, collected by me, during a residence of nearly 
five-and-tweuty years in the Radcliffe Infirmary, as apothe- 
cary to that institution. ? In 
