Still using a 1930s pressure canner (from National Pressure Cooker Co.) that's been used by my family for 5 generationsAndyb1000 t1_j1hckpm wrote
Reply to comment by barefoot-warrior in Still using a 1930s pressure canner (from National Pressure Cooker Co.) that's been used by my family for 5 generations by ubermaker77
This is in the context of horticulture but I guess the principle of the same for other disciplines.
https://www.thespruce.com/what-is-an-extension-office-5189448
sirJ69 t1_j1hmrbm wrote
It is the same. Pressure canning is used to preserve your crop so one of the services they provide is calibrate pressure canner gauges.
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