Found it!

British Journal of Photography, Vol. 58 (1911), p. 969-971 - link here

You can open it as a PDF and print out just the pages you need, or you can "read online", or any number of options off to the left of the page. I've also attached it in 3 JPGs.

Haven't even had a chance to read it yet, but isn't the internet amazing? rarely disappoints!