[Arthur McGowan]

I suspect it’s because, with satellites, the barometer now is far less important as a predictor of storms.

Also, millibars is Metric, so this is a way to promote the values of the French Revolution and Globalism.

[tsomer]

Thanks for your input.

Now my question, but first one final tangent:

I’m a woodworker and do marquetry. I use veneers that are .6 and .3 mm s in thickness, and I dye these to assure color permanence. I have a vacuum pump that will pull around 24” of mercury and sometimes I use that to force the dye all the way through the wood. I hate the noise that pump makes,so I’ve adopted another method.

The new method involves quart mason jars 3/4 full of dye,into which I plunge the veneer. Then I put the jar in the microwave to heat the dye. Once the dye is boiling I put the lid on it and screw the ring tight and take everything out of the kitchen (I always do this when the wife is out). Then I stash the sealed jars and forget about them for a few hours.

When I return to my jar stash, they’ve cooled to room temp and created a vacuum that infuses the veneers with the dyes. This method is just as reliable the vacuum pump.

I’ve been trying to figure out how much vacuum pressure is in those jars once the water cools to around 70f. I know some of it is caused by the liquid, but most is due to vapor condensation— in other words, the 8 ounce empty volume is creating most of the vacuum.

Would anybody care to take the time, or suggest where I could find the info? Yes, I ought to know this, but I was probably asleep that day in school...