1826.] Scientific Notices — Mineralogy. 149 



expected from the Abbe Ranzani, and also the analysis of the 

 stones by Dr. Santagata. — (Bullet, des Sciences.) 



5. Analysis of the Maryland Aerolite. By Mr. George Chilton, 

 With an additional Notice of its physical Characters, by Prof. 

 Silliman. 



In the Annals for September last, we gave Dr. Carver's 

 account of the fall of this stone : we now extract from Silliman 's 

 Journal the following particulars of its chemical constitution and 

 physical characters. 



Results of Mr. Chilton's analysis of the Maryland aerolite : 

 specific gravity 3*66. Twenty-five grains of the unmagnetical 

 portion contained : 



Silica 14'90 



Magnesia 2-60 



Lime 0-45 



Oxide of iron 6-15 



Oxide of nickel 0-80 



Sulphur 1-27 



Alumina 0-05 



26-22 



The same quantity of the magnetical portion gave, 



Oxide of iron 24-00 



Oxide of nickel 1-25 



Silica, with other earthy matter 3-46 



Sulphur A trace 



28-71 



Prof. Silliman's Additional Notice of the physical Characters of 

 the Maryland Aerolite. 



As the visits of these extraordinary strangers to our planet 

 are frequent, and their origin is not yet satisfactorily explained, 

 it is obviously proper to register carefully all the facts respect- 

 ing them, that thus we, or those who follow us, may, by and 

 bye, be in a condition to reason correctly respecting them. 



We hastened to lay before our readers the account vhich we 

 received of the fall of the Maryland aerolite ; 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 dimen- 

 sions are seven inches by three and four ; its form is that of aa 

 irregular ovoidal protuberance, nearly flat where it was detached 



