I also have one that I got during my first visit to the Pacific Science
Center in Seattle when I was in 6th grade...  about 1973...  still works
great...  and Yau-man...  I took it out and held it under the light, the
black side trails...

Anything for science...  :)
Bill Johnson
'85 GL Westy (now with new, improved SA grilles)
'97 VFR750
'67 Bug
-----Original Message-----

>YauMan Chan wrote:
>
>> This little radiometer was actually in a few Physics Ph.D. oral exam
around the country when it first came out in the 70's!
>
>Actually I got one in 1961 on my first visit to Disneyland.  It's the
>Sleeping Beauty model and still spinnin' after all these years.  Walt
>was always on the cutting edge of technology.