Professor Gray's Text Book went through five editions under the sole supervision of the author. When the sixth was called for botany had so far advanced that Dr. Gray had to commit portions of the work to other hands. It was divided into four volumes, first, Structural Botany, from his own pen, and which appeared several years ago. Sketch of the natural orders, which we hope he will yet give us. Cryptogamic Botany committed to Professor Far-low's care; and Physiological Botany by Professor Goodale. The last is to be the second volume, of which part the first is now before us. When complete it will be probably the most popular Text Book of Botany that has appeared in any country.