Paper, 'Memorandum's about experiments upon gold, and the aethereale spirit that have been done here' by unknown author Paper describing experiments to dissolve gold using aqua regia and separate the resulting liquids. The author also discusses gold-tinted glass sticks made with small amounts of gold in Venice [Italy], and his attempt to recreate the sticks using white sand, nitre, ceruss [cerussite], borrax [borax], salt, and fine gold. Subject: Chemistry Read to the Royal Society on 26 February 1729. [1729]