Re: [pinhole-discussion] Re: lesson plans for students

[Richard M. Koolish]

Andy Schmitt writes:
> 
> ..gee can't wait to see you try a pinhole in it.. 8o)


    See: http://web.mit.edu/invent/www/inventorsA-H/edgerton.html

    and scroll down to the picture of Doc Edgerton and the balloon.