John H. Johnson, of London, Eng., has patented a method of preserving food. It consists in the application of an airtight envelope or covering of gutta percha, caoutchouc, or other similar impervious material, thereby perfectly protecting the article to be preserved from the action and contact of the atmosphere. The food to be protected is immersed once or oftener in a liquid formed of the above materials. This invention was patented in the United States by C. Van Vleck, Macomb, 111., June, 30, 1857.