In charge of Lieut. Geo. M. Wheeler, Vol. VI., Botany, by Dr. J. T. Rothrock, Washington, 1878. The work and the publications of our Government surveys are acknowledged in Europe to be far superior to anything undertaken by foreign governments, and are such as to make every American feel proud of his country. Of this particular volume we can say that it is especially one that will sustain this eminent reputation. The plants collected by Dr. Rothrock, who was surgeon and botanist to the expedition, give Us a good idea of the flora of Nevada, Utah, Colorado, New Mexico and Arizona. Many of the plants found are entirely new, and in this respect the expedition was unusually fortunate. The volume is a good companion to Watson's Botany of the King Expedition, by Sereno Watson, which hitherto has been regarded as one of the best works of the class ever issued in the United States.