| Description | [Concerning use of fluor in soldering. He has sent a small cask of it, from Roskear mine, to London to be forwarded by sea. Mr Magellan, their agent in France has made enquiries about the latent heat and its possible invention in Sweden. Has been shown a crystallization of fluor in Cornwall like artificial quartz. The proposals for the copying scheme will soon be published and some presses are under construction. The price has been raised to six guineas]. (Partners no. 60) |