Letters of Asa Gray; Vol. 2

by Asa Gray

1859. Report of the United States and Mexican Boundary Survey made by W. H. Emory. Pp. 34, 73-107, 110-121, 154, 172-175, with five plates.

1860. Catalogue of plants collected East of the Rocky Mountains. Pacific R. R. Surveys, XII. part 2, 40-49, with three plates.

1860. Report upon the Colorado River of the West, explored in 1857 and 1858 by Lieut. Joseph C. Ives. Part IV. Botany; orders preceding Verbenaceæ, excepting Cactaceæ, pp. 1-20.

1880. Botany of the Black Hills of Dacota. Report of H. Newton and W. P. Jenney. U. S. Geol. and Geogr. Survey, Rocky Mountain region, 529-537.

1881. The vegetation of the Rocky Mountain region and a comparison with that of other parts of the world. By A. Gray and J. D. Hooker. Bull. U. S. Geol. and Geogr. Survey of the Territories, VI. 1-77.

4. Contributions to Periodicals.

North American Review—

1844. The Longevity of Trees. July. 189-238.

1845. The Chemistry of Vegetation. January. 3-42.

1846. Scientific results of the Exploring Expedition. July. 211-226.