Retrospect of Philosophical, Mechanical, Chemical, and Ag...
Wyatt, W. H.![Retrospect of Philosophical, Mechanical, Chemical, and Agricultural Discoveries, Vol. 5](https://support.digitalhusky.com/media/annotations/sorted/266/26637888/CHSBZCOP0326637888.jpg)
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 c...