With the advent of freezers and mechanical refrigeration, ice cream production soared, with 150 million gallons of ice cream being made in the U.S. in 1919.

• 有了冰箱和冷藏技术之后，冰淇淋制造业也随之蓬勃发展，一九一九年美国制造了一亿五千万加仑的冰淇淋。