Recently I was attempting to sort out the accumulated rubbish in my office
in the way that you do when you come to feel that, if you don=B9t drink
your
best wine soon, you might never get the chance. By chance I came across a
photograph of an ancient (ca 1980) starch picture that posed a question
to
students who got to see it. The picture was formed in starch in a
=8CGeranium=B9 (i.e Pelargonium) leaf by illuminating through a negative
in a
slide projector. The negative itself comprised a Beardsley print on which
was superimposed the question. I couldn=B9t bring myself to bin it without
sharing it, so for anyone who is interested, it can now be downloaded (and
used) from
http://www.oxygraphics.plus.com//Beardsley.gif
David
>From David Alan Walker, FRS; Emeritus Professor of Photosynthesis,
University of Sheffield, UK.
http://www.oxygraphics.co.uk/http://www.peerlesspublications.co.uk/
