The references under authors' names, when numerous, are sometimes alphabetized, or distributed according to subjects, but often follow the order of the volumes. Works reviewed are mentioned under the names of their authors, and also under the word _Works_. When an article is illustrated by figures or plates, the fact is noted by adding to the number of the page, the letter f. A Supplement, is added, containing some omitted references. The list of plates and wood cuts, is arranged according to volumes, and the page or article is mentioned which each illustrates. The numbers in this list indicate the proper order of succession in each volume, and not the numbers that may appear on the plates. [Footnote A: Vol. xxv, p. 215. Obituary notice of Col. Gibbs.] [Footnote B: Taken from Vol. i, Am. Jour. Sci. and Arts, pp. v, vi; also pp. 1 to 8, July, 1818.] [Footnote C: The date of the incipient movements.] [Footnote D: Late the _Rivoli_ collection of Paris.] [Footnote E: Especially our ancient compeer, The Journal of the Franklin Institute at Philadelphia.] ERRATA. Page 14, col. 1, line 24 from bottom, for "Lea," read "Lee." " 22, " 2, " 22 " " for "368," read "367." " 23, " 2, " 12 " " dele "Barnes, D. W." " 75, " 1, " 15 from top, for "156," read "157." " 86, " 2, " 22 " " for "358," read "354." " 98, " 2, " 4 from bottom, for "xxxiii," read "xxxii." " 156, " 2, " 12 and 13 from bottom, dele the lines. " 185, " 1, " 16 from bottom, for "xxxiii," read "xxiii." " 185, " 1, " 21 " " for "271," read "371." " 212, " 1, " 12 from top, dele "x, 203; xi, 335," and insert the same in the 2d line from top. Page 287, col. 2, line 21 from top, insert xliii, 390. " 287, " 2, " 3 from bottom, insert xxiv, 151. [ TRANSCRIBER'S NOTE: The above errata from the printed edition have been applied to this e-text, also see further transcriber notes at the end. ] INDEX _Abbot, J. H._, Description of some new electro-magnetic, and magneto-electric instruments and experiments, xl, 104.^f ----, theory of the pneumatic paradox, xxxix, 296^f; xl, 144.^f Aberration of the fixed stars, _F. Struve_, xlvii, 91. Absorption in animals, mechanism of, _F. Magendie_, iii, 288.