Excerpt from The Boston School Compendium of Natural and Experimental Philosophy: Embracing the Elementary Principles of Mechanics, Hydrostatics, Hydraulics, Pneumatics, Acoustics, Pyronomics, Optics, Electricity, Galvanism, Magnetism, Electro-Magnetism, & Astronomy, With a Description of the Steam and Locomotive EnginesAnnals of Philosophy, Arnott's Elements of Physic, Bigelow's Technology, Cambridge Physics, Chambers' Dictionary, En field's, Olmsted's, Blair's, Bakewell's, Draper's, Grand's, Jones', Comstock's, and Conversations on Natural Philosophy, Franklin's Philosophical Papers, Henry's Chemistry, King's Manual of Elec tricity, Lardner on the Steam Engine, Library of Useful Knowl edge, Paxton's Introduction to the Study of Anatomy, Pambour on Locomotive Engines on Railways, Phillips' Astronomy, Silli man's Journal of Science, Singer's Electricity, Scientific Class Book, Scientific Dialogues, Smith's Explanatory Key, The Year Book, , Turner's Chemistry, Wilkins' Astronomy, Worcester's and the American School Geography.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.