Excerpt from Chemical Instructor: Presenting a Familiar Method of Teaching the Chemical Principles and Operations of the Most Practical Utility to Farmers, Mechanics, Housekeepers and Physicians; And Most Interesting to Clergymen and Lawyers Pneumatic cistern. For an economical course of in struction, such as that proposed in the following work, a wooden box, three feet long, eighteen inches deep and eighteen inches wide, will be sufiiciept. It is made of pine plank, so arranged that the grains of the wood all run in the same direction 5 so that all the pieces, consti toting the cistern, may swell and shrink uniformly. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.