James D. Forbes, “A Review of the Progress of Mathematical and Physical Science in more recent times, and particularly between the years 1775 and 1850; being one of the dissertations prefixed to the eighth edition of the Encyclopaedia Britannica” (Edinburgh: Adam and Charles Black, 1858)., 1858., Acc.13827/1041. Further papers of the Forbes and Stuart Forbes families of Fettercairn and Pitsligo, with papers of the Trefusis family relating to Fettercairn and Pitsligo., Acc.13827/1-1103. National Library of Scotland Archives and Manuscripts Division. https://nlssb.as.atlas-sys.com/repositories/2/archival_objects/134613 Accessed September 23, 2024.