Posted on 06/05/2022 6:18:00 PM PDT by SunkenCiv
The first form of artificial refrigeration was invented by William Cullen, a Scottish scientist. Cullen showed how the rapid heating of liquid to a gas can result in cooling. This is the principle behind refrigeration that still remains today. Cullen never turned his theory into practice, but many were inspired to try to realize his idea.
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That looks a lot like the one I didn’t buy. :^) Having the mechanism on top was the way of building those for quite a while, because so many were modified former iceboxes. :^) My relatives next door had a shorter version, shorter legs, and curved corners, like postwar Frigidaires (that’s what I grew up with).
“how the rapid heating of liquid to a gas can result in cooling.”
Holy cow! That’s not at all how refrigeration works.
Sure, now — unless you ever had access to a propane-powered fridge in a motor home back in the 1970s of course.
I haven’t watched that one in a while, best of the three, IMHO. The sands of time have really slid through the neck of the hourglass since then...
https://i.pinimg.com/originals/39/ee/77/39ee778f588d74022e425fcd25fc8431.jpg
It was an amazingly well done show.
L
The rag man, great job to have. :^) I had an art teacher in high school who talked about the rag man from his childhood, and how the rags were used to make rag paper, which was what we were using for one of our assignments.
Exactly. That and food preservation.
He kept redoing the series to update it, and to gradually add his take on Marxism. But all of them are worth a listen. Somewhere I haVe the later series (”Axemaker’s Gift”, maybe another one) on cassette audiobook, read by the author. :^)
Yeah, and with those kilts, they fit into the modern trans world. ;^)
Lots of replies, but not much substance.
My mother told me how the Iceman would spend all winter chopping ice from the lake and bury it,
Then in the summer he would deliver pieces daily like the milkman.
Before freon they used ammonia, and it worked well.
And there were sterling engines too.
This is just in recent history
The Return of the Ragpicker by Og Mandino, a good book.
Did you also walk to school in the snow, uphill, both ways, even in the scorching 200 degree summer? :P
It worked well until the ammonia got out, and then people died. :P
Mama grew up with an Ice Box.
Is your refrigerator running?
Ammonia is still in use in commercial refrigeration, because it’s cheap and more energy-efficient than CFCs.
https://www.frostpoint.net/articles/everything-you-need-to-know-about-ammonia-refrigeration.html
That’s called a “Monitor Top”.
I was looking to buy an old house in Miami—included downstairs was a “Monitor Top” refrigerator. I considered the refrigerator, intending to restore it.
At a yard sale in New Hampshire, a huge brown refrigerator was for sale. Almost a “walk-in”, I begged the owner to list it separately, perhaps as a movie prop. Its refrigerant was sulfur dioxide or something very exotic.
It later appeared at the town recycling center, and again, I begged the employees to rescue it! Its whereabouts is unknown.
It may have had a protracted life, as recycling the gas was likely problematical.
My Dad, born in 1917, used to tell about the excitement when the ice man came around in his horse drawn ice wagon. He called a refrigerator an "ice box" until the day he died in 1988.
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