We have already noticed Dr. Schacht’s previous works on the microscope as applied to botanical subjects, and his more important one upon the Plant-cell—and have again the pleasing task of directing our readers’ attention to another from his indefatigable pen—which, like the former, contains a vast amount of matter interesting especially to the microscopic observer.

Like the previous works by the same writer, the present is the result in great measure of independent research, and is therefore the more interesting and useful, and contains the results of valuable investigations which were made during a prolonged residence in the forests of Thuringia.

It gives a considerable series of detailed, recent inquiries respecting the germination and growth of Forest trees, the anatomical conditions of the wood, the formation of cork and bark, on the structure and growth of the leaves and roots, on the formation of branches and of the buds, and lastly, on that of the blossom and fruit of most of our common useful trees.