G.Wright
Wm. Thomson (Baron KELVIN)
W.CLARK & KELVIN & J. WHITE LTD.
LONDON
![Image](http://i238.photobucket.com/albums/ff301/cpedw/Picture001.jpg)
I'm mystified that so many people, including one very illustrious scientist, wanted to get involved in a spirit level. What do you think?
Derek
(I'm also feeling smug that I managed to post a picture after a bit of fiddling)