[AZ-Observing] Re: Cross Hair material

The problem with human hair is that it expands and contracts strongly 
with humidity.  In fact, a strand of hair can be used to make a humidity 
indicator, twisting a pointer.
Gene Lucas
(12750)

Jimmy Ray wrote:

>Way back in the old days, guys who use to rebuild surveying equipment used
>web from the black widow spider, as it was strong and fine. I would think
>that human hair is way bigger that that but I'm sure someone out on the web
>has blazed that trail for you.
>
>Jimmy Ray
>
>-----Original Message-----
>From: az-observing-bounce@xxxxxxxxxxxxx
>[mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Stan Gorodenski
>Sent: Tuesday, February 27, 2007 3:29 PM
>To: AZ-Observing
>Subject: [AZ-Observing] Cross Hair material
>
>
>Has anyone tried to make a crosshair eyepiece out of their own hair, in
>my case gray hair? The name implies a 'hair' and so it seems like it
>shouldn't be a problem.
>Stan
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>  
>

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