Direct Expansion System Small 320×147 Medium 640×295 Large 1024×471 Download Tiff Original 2400×1105 | (629.2 KB) Description A refrigeration technique using ammonia. Keywords frig, ice box, refrigerator Galleries Appliances Source: Fredrick Converse Beach, Editor The Americana: A Universal Reference ( New York: Scientific American, [c1912]) 17: Refrigeration
