The following notes are given by Bogatov, Prozorova & Starobogatov (2003: Ruthenica 13(1): 41-45) based on a personal communication by D. Kadolsky. The volume containing Schumacher's paper does not bear a number, and the publication date of 1816 is only printed on the last page, i.e. p. 42. According to
Gosch [1878: 217] the actual publication date of Schumacher’s article is 1815, and the “last two years” in the journal title refer to 1813-1815. Possibly the last part (pp. 31-42) of this volume was actually published later (i.e. 1816) than the first part. Confusingly, Schumacher's article was reprinted literally on p. VI. in a later issue of the same journal. which. according to the title page, contains an overview of the works of the Society's members from 1814 to 1822.
