Posted by Tom Napier on July 05, 2012 at 04:55:54 user Didymus.
In Reply to: Actually using the information in Swallows and Amazons! posted by Eric Abraham on July 03, 2012 at 06:13:19:
In the early 1950s I would show off my knowledge of chemistry by adding ammonia to a solution of copper sulphate. This produced an intensely blue liquid just as I had read in PP. I still have my "lab notes" of that experiment.