Anelysis of the Maryland Merolite. 135 
Oxide of Iron - - - 24.00 
Oxide of Nickel - - 1.25 
Silica with other earthy matter 3.46 
Sulphur a trace. 
28.71 
The presence of sulphur was indicated by the odour of 
sulphuretted hydrogen, on the first addition of the acid. 
Additional notice of the physical characters of the Maryland 
Aerolite. 
As the visits of these extraordinary strangers to our plan- 
et are frequent, and their origin is not yet satisfactorily ex- 
plained, it is obviously proper to register carefully all the 
facts respecting them, that thus we, or those who follow us, 
may, by and by be ina condition to reason correctly respect- 
ing them. 
We hastened to lay before our readess the account which 
we received of the fall of the Maryland erolite,* but as no 
specimen had then been received, it was not possible to give 
at that time either a description or an analysis. Mr. Chilton 
has supplied the analysis. We add the following notice of 
the appearance of the stone. - 
An excellent specimen for which we are indebted to Dr. 
Samuel D. Carver, weighs four pounds five ounces. Its di- 
mensions are seven inches by threeand four ; its form is that of 
an irregular ovoidal protuberance, nearly flat where it was 
detached from the larger mass, and bounded by irregular 
eurves in the other parts of the surface. In all parts, ex- 
cept where it has been fractured, it is covered by the usual 
black vitreous coating, which, in this case, especially when 
it is viewed by a magnifier, has more lustre than is common. 
This coating is severed by innumerable cracks running in 
every direction, and communicating with each other, so as 
to divide the surface into polygons resembling honey-comb 
or madrepore, and no undivided portion of the surface ex- 
ceeds half an inch in diameter. 
* Vol. IX. page 351. 
