Excerpt from Retrospect of Philosophical, Mechanical, Chemical, and Agricultural Discoveries, Vol. 5: Being an Abridgment of the Periodical and Other Publications, English and Foreign, Relative to Arts, Chemistry, Manufactures, Agriculture, and Natural Philosophy, Accompanied, Occasionally, With Remarks on the Merits or Defects of the Respective PapersDescription of an Invention to secure the Fannels of Doors and Win. Dow-shutters from being cut out by House-breakers. By Mr. J osaru dav.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.