Does anyone make ice cream at home these days? That was one of our favorite treats as kids – back when we had three network channels and no recording devices. I’m not going to look into modern ice cream makers for home, but I’ll bet they have cheaters that don’t require ice and salt. Why is salt used with ice to freeze ice cream? Read on to find out. Anyway, I found an early-patented “refrigeration system” (1793) that used ice and salt with charcoal and blankets for insulation. The simple mechanical refrigeration cycle was invented in the early 1900s. Mechanical…
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