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Originally Posted by Brandon314159
Not to threadjack an otherwise VERY important thread however my lab class evacuated our entire high school twice. And its not a small school.
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I did something similar in 1975 only I heated arsenic in a crucible.
My experiments bordered on the bizzare.
Anyway back to the topic on sodium cooled valves. Years ago when one purchased new sodium cooled valves there was a warning on the box that said it was unsafe to grind them because of water solulable cooling oil used in valve grinders. I always took their word for it and threw the old ones away.