[OT] The empire that was - Russia (or: Colour photos from B&W)

[Peter Homann <"peter.homann"@@prr.org.au>]

For those interested in photography, there's a few pages on the US
Library of Congress site that detail the procedure used by Sergei
Mikhailovich Prokudin-Gorskii to photograph the Russian empire between
1909 and 1915.
The interesting part is that he used some cleverly thought out filtering
to be able to end up with projections (and now with digital technology,
reproductions) in colour, from three B&W plates.

As a teaser, there are a couple of rail photos on the site.

http://www.loc.gov/exhibits/empire/

Cheers for now.
-- 
============================
 Peter Homann
============================
The light at the end of the tunnel will be turned off
until economic conditions improve.  Management.