Excerpt from The Elements of Natural and Experimental Philosophy: Including Physics, Dynamics, Mechanics, Hydrostatics, Hydraulics, Pneumatics, Acoustics, Optics, Electricity, Galvanism, Magnetism, Astronomy, According to the Latest DiscoveriesEvery instructer of youth must be aware, that mere disquisitions are Of no use in the art of teaching; and that no science can be taught, if the student does not work or perform operations in it, or answer ques tions which involve the consideration of its various details.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.