Yes - sorry, wasn't clear - the iron-in-a-bag type that you have to shake to activate. They last for several hours. ----- Original Message ----- From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Cc: Sent: Tuesday, January 22, 2013 2:15 PM Subject: Re: [Utah-astronomy] laser pointers OK, you were talking about the chemical type in a plastic bag. No sock needed for that. I was thinking the old fashioned lighter-fluid catalytic type that got really toasty. On Tue, Jan 22, 2013 at 2:13 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
You could slip a hand-warmer into an outer front vest pocket, in a sock or two. Then just put the laser next to it, like a pen in a front shirt pocket.
On Tue, Jan 22, 2013 at 1:47 PM, Scott Catron <zaui@yahoo.com> wrote:
As for keeping it warm, would it be feasible to rubber-band a couple hand warmers around it?
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