Freezers

Examples

• Over 600 United States patents have been granted for ice machines alone, to say nothing of refrigerating buildings, refrigerator cars, domestic refrigerators, and ice cream freezers, etc. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• The use of salt and ice in ice-cream freezers is a practical application of this principle. Bertha M. Clark. General Science.

Edited by Elena