Joseph Black describes the apparatus he uses for weighing items like small globules of metal.
Date: Written in 1790.
Publication: 'Annals of Philosophy', volume 10, July-December 1825, Pages 52-54.
Joseph Black wrote this letter to mineralogist and chemist James Smithson on 18 September 1790. It was a reply to Smithson's letter of 9 September.
The letter includes a small diagram. This show how the numeration is display on the apparatus Black uses for weighing 'small globules of metal, or the like'.
Following Black's letter is a note from Smithson written from London on May 12 1825. He describes Black's little balance as 'a very valuable addition to the blowpipe apparatus'.