Unpublished paper, 'Quelques idées relatives à l'Analyse des Liqueurs spiritueuses sucrées' [Ascertaining the strength of sweetened spirit liqueurs] by A van der Toorn Van der Toorn describes a method for measuring the strength of spirits which involves distillation, partial evaporation and absorption. Subject: Brewing / Liquors A note by J G Children reads 'See Minutes 13 January 1835 (see page 30)'. 1835