The important features of the improvement consist in so constructing the gauge that a very long heavy column of mercury may be used in a small space to exert its pressure upon the steam in the boiler.

an Arduino-driven steam gauge. The build began as an old 10″ Ashcroft pressure gauge sourced from eBay, which [Murphy’s_Lawyer] dissected to determine the state of its guts. Finding the gauge ...

As the hot steam cools and condenses to water, a vacuum is created inside the can and atmospheric pressure will crush it. 250 ml water to a 5 gallon can 20 min to boil, 1 or 2 min to collapse.

There certainly has been an upsurge of home gardening. Folks want to know where their food comes from. And they want to preserve it by drying, canning, freezing and storing. This article is about ...