116 C. Atwater, Esq. on the 



Red Oxyde of Titanium — ^in Leyden, crystallized on quartz 

 and tremolite, chiefly on the latter ; colour brownish 

 red — specific gravity 4. 32 ; scratches glass, hand- 

 . somely geniculated, and sometimes several geniculations 

 in the same specimen ; in one as many as six could be 

 perceived. 

 Eagle Stone, or Nodular argillaceous Oxide of Iron — one 



specimen on the banks of Deerfield river. 

 Rose-red (Quartz — a loose 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. Their 

 kindness, it is believed, will not soon be forgotten. To 

 several others, also, I am indebted for communicating facts of 

 importance. 



Deerfield, October, 1817. 



Art. II. On the Prairies and Barrens of the West, by 

 Caleb Atwater, Esq. in Letters to the Editor. 



CiRCLEViLLE, Ohio, May 28, 1818. 

 Dear Sir, 



X 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 here 

 applied only to natural meadows. They are found in all the 

 states and territories west of the Allegany mountains, more or 

 less numerous, of greater or less extent. They are covered 

 with a coarse kind of grass, which, before the country is settled 



