I dimly remember hearing of using water for this but not more elaborate things like CaCl2...
According to þe olde CRC handboke, you can depress the freezing point farther with calcium chloride (about 50°) than with sodium chloride (21° or so). The temperature does reach -21C/-7F in some arable (and supposedly habitable) places. Or so I am told by travelers from distant lands.
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timeasmymeasure
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Date: 2005-08-27 06:58 pm (UTC)According to þe olde CRC handboke, you can depress the freezing point farther with calcium chloride (about 50°) than with sodium chloride (21° or so). The temperature does reach -21C/-7F in some arable (and supposedly habitable) places. Or so I am told by travelers from distant lands.