Excerpt from Elements of Natural Philosophy: A Text-Book for High Schools and AcademiesYou would do well to secure, in the fall of the year, a supply of the pith of elder or sun¿ower stalk, and several full-blown thistle-heads, that they may be well dried and ready for experiments in electricity during the dry, cold weather of winter.The author would be glad to receive any suggestions from any of his fellow-teachers who may use this book, or to answer any inquiries concerning the study or apparatus.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.