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412 States, not to speak of recent annexations. I am much disposed to think so. The U. S. Department of Agriculture has, with commendable enterprise, recently undertaken the introduction of date palms into Arizona and California, and there can scarcely be any doubt of the ultimate success of the effort. There are many other palms that will thrive in a climate where dates can be grown.

Literature.—For the benefit of those who may wish further and more detailed information regarding palms a list of the most important works on the subject is appended; a few other titles are mentioned in the foot-notes.

1. Voyage dans l'Amérique méridionale, etc., Par Alcide D'Orbigny, Tome septième, 3e partie. Palmiers. Descriptio palmarum in Paragueria et Bolivia crescentium. . . schedulas et incones digesit. Car. Fr. Ph. De Martius, pp. 140 and atlas of colored plates. Paris et Strasbourg, 1847.

2. Historia naturalis palmarum. Auctor C. F. P. de Martius. 3 vols, folio. Leipzig, n. d.

3. Palms of British East India. By William Griffith. Calcutta, 1850, folio.

4. Palm Trees of the Amazon and their Uses. By Alfred R. Wallace. 48 plates, 129 pp., London, 1853.

5. Popular History of the Palms and their Allies. By Berthold Seeman. xvi $$+$$ 359, III., London, 1856.

6. Palmæ mattogrossenses novæ vel minas cognitæ quas collegit descripsit et iconibus illustravit. J. Barbosa Rodriguez, xx $$+$$ 92, 27 plates. Rio de Janeiro, 1898.

7. Palmæ novæ Paraguayenses quas descripsit et iconibus illustravit J. Barbosa Rodriguez, ix $$+$$ 66, 6 plates, Rio de Janeiro, 1899.

8. Flora Brasiliensis. Fasciculus 55, Palmæ. Exposuit Oscar Drude. Lipsiæ, 1881.

9. Palmæ Amazonicæ sive enumeratio palmarum in itinere suo per regiones Americæ æquetoriales lectarum. Auctor Ricardo Spruce. Read Jan. 21, 1869. Proc. Linn. Society, XL, 65, 183.

10. New Palms collected in the Amazon valley in 1874. By James W. H. Trail. 'Journal of Botany,' Nov. and Dec, 1876, Jan., Feb. and Mar., 1877.

11. The origin and distribution of the cocoa palm. By O. F. Cook. Contributions from the U. S. Nat. Herbarium. Vol. VII., pp. 257-293. Washington, 1901.