116 @. Atwater, Esq. on the 
Red Oxide of Titanium—in Leyden, crystallized on quartz 
and tremolite, chiefly on the latter; colour brownish red 
—specific gravity 4.232; scratches glass, handsomely 
geniculated, and sometimes several geniculations in the 
same specimen; in one, as many as six could be per- 
ceived. 
Eagle Stone, or Nodular argillaceous Oxide of Tron—one 
specimen on the banks of Deerfield river. 
Rose-red Quartz—a louse mass in alluvial soil, Deerfield. 
Red Oxide of Titanium—in Shelburne. 
I would acknowledge my peculiar obligations to Professor 
Silliman, of New-Haven, and to Dr. David Hunt, of North- 
ampton, Mass. for the very generous assistance they have 
given me in a commencement of the study of mineralogy, and 
for their liberal aid in this particular communication. Theis 
kindness, it is believed, will not soon he forgotten. To seve- 
ral others, also, I am indebted for communicating facts of im- 
Deerfield, October, 1817. 
eee 
Arr. II. On the Prairies and Barrens of the West, by Cavt® 
Atwater, Esa. in Letters to the Editor. 
CrncievitiE, Ohio, May 28, 1818: 
Dear Sir, 
I SEND you for publication in the Journal of Science, an 
Essay on the Prairies and Barrens found in this country- 
: Description of the Prairies. 
Prairie is a French word, signifying a meadow, but is ber? 
applied only to natural meadows. They are found in all th 
states and territories west of the Alleghany mountains, more oF 
Jess numerous, of greater or less extent. They are covered 
with a coarse kind of grass, which, before the country is settled 
tS; 
