The Demon in the Freezer. Fawcett. pp. 105–15. ISBN 978-0-345-46663-1. ^ "History and Epidemiology of Global Smallpox Eradication" (PDF). Smallpox: Disease, Prevention, and Intervention. CDC and the World Health Organization. Archived from the original (PDF) on 15 July 2007. Slide ...
It got a lot easier to keep food fresh at home in the 1920s, when the refrigerator started to become an essential appliance for every kitchen. Manufacturers produced about5,000 refrigeratorsin the U.S. in 1921, according to History Magazine (via The Packer). Over the next decade, another ...