27 Jul
2007
27 Jul
'07
12:14 p.m.
On 27 Jul 2007 at 13:04, John Foust wrote:
Hmm, that reminds me of a lingering question in my
mind.
As a kid, I remember harvesting tubes from dead TVs behind
the repair shop. Breaking the tube, there was often a ring
at the top, U-shaped in cross-section. I seem to remember
that they were filled with a powder that reacted with
water, fizzing. Am I mixing up this smell-memory with playing
with calcium carbide? What were common getter chemicals?
Not CaC2, but any of a variety of metals:
http://en.wikipedia.org/wiki/Getter
Cheers,
Chuck