Thanks Pete. I knew that I had seen it somewhere. I remember now that it
was not in a dictionary but on a bottle that I had seen it in a local
hardware store on the same shelf as the spirits of salt where you could
still buy both last time I looked. It was the kind of old fashioned store
that people with 10 x 8s like to photograph and buy their spirits of salt
for clearing Pt prints and spirits of wine for clearing green chrome salts
from some gum prints.
Strangely I could not find a referece in Chambers 21 Century, Chambers
Technical, the Complete Oxford or Websters dictionaries.
Perhaps Chris Fox, with his his lexographical skills, could advise.
Terrry King