Paper, water vapours and droplets viewed through microscope by Augustus Volney Waller Plate containing figures 1-8 showing water vapours from breath and steam, water droplets, and frozen water droplets viewed through a microscope. Canada balsam and castor oil are used to preserve the water droplets. Subject: Physics Published in Philosophical Transactions as 'Microscopic observations on the so-called vesicular vapours of water, as existing in the vapours of steam, and in clouds, &c'. Written by Waller in Kensington [London]. Communicated by P M [Peter Mark] Roget. Received by the Royal Society on 13 April 1846. Read 16 June 1846. 12 April 1846