J. L. Smith— Mass of Meteoric Iron. 891 
developed, that will probably be found to equal, in beauty and 
grandeur, any yet discovered upon the North American conti- 
nent within the limits of the United States. This little known 
and other determinations, over an area of nearly 20,000 square 
miles in Colorado. Positions have been determined with accu- 
tacy, and the amount of topographical detail gathered will 
supply all that can be placed upon a map of the scale intended. 
é backbone of the continent within the latitudinal areas trav- 
ersed is most wonderfully intricate in its topographical and geo- 
logical forms. The collections in natural history, especially in 
the departments of ornithology and botany, have been large, and 
consist of many rare specimens. ey are now, through the 
kindness of the Smithsonian Institution, in the hands of emi- 
Publications.—During the present year, the first publication of 
the topographical atlas up to date will be made. This com 
—, 
Art. XXXVL—On a Mass of Meteorie Iron of Howard (p., 
Ind. ; with some remarks on the molecular structure of meteoric 
‘ron, and a notice concerning the e of solid protochloride of 
‘ron in Meteorites ; by J. LAWRENCE SMITH, Louisville, Ky. 
ting a ditch in Howard County, Indiana struck, at a depth of 
nearly two feet, a hard mass that attracted 
our. So.—TuirD | pea Von. VI, No. 40.—Arri, 1874. 
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