Janos Bolyai's twenty six-page appendix, "Scientiam spatii absolute veram exhibens ..." begins after page 502 of vol. 1.

Date precedes publication statement on both title pages.

Imprimatur on versos of both title pages.

List of subscribers: vol. 1, ℗ø[E]1; vol. 2: 26́ verso.

Errata begins on page XXXIII of vol. 1 and on page 373 of vol. 2.

Collation vol. 1: 8vo: pi℗ø I-VÍþ VII℗ø 26́þ(-26́) chíþ XVIIÍþ ℗øchi℗ø A-X́þ Źþ J́þ V́þ 2A-2X́þ 2Źþ 2J́þ 2V́þ 3A-3Ṕþ; ℗øA-Ćþ ℗øD℗ø ℗ø[E]́ı [$2 (-pi, chi, ℗øchi, ℗ø[E]) signed; second leaves in I-VII, 26, XVIII, G-3P signed with asterisk; 315 leaves, pp. [4], LXXVIII, 502, [2], 26, [2], XVI (misnumbering XV, LXXVIII, 60 as XVI, LXXIII, and 69 respectively; pages LVIIII, 17 (first sequence), unnumbered) + [1] folded letterpress leaf and 4 folded leaves of plates]

Collation vol. 2: 8vo: pi℗ø(pi1+1) Íı 1-22́ı 23℗ø 24́ı 26́ı(-26́,́˜) 27́ı(27́˜́́) [$2 (-pi) signed; second leaves in all gatherings signed with an asterisk; 212 leaves, pp. [6], XVI, 402 (missigning 27́ as 28́; page 385 unnumbered) + 10 folded leaves of plates]

Plate three of vol. 1 contains four overslips. In vol. 2, plate seven contains ten overslips, plate eight contains three overslips, plate nine contains two overslips, and plate ten contains five overslips.

Dibner Library. Heralds of science , entry 116

Boston Public Library (Rare Books Department) copy bound in ca. late 19th-/early 20th-century tan buckram. Maroon labels are present on both spines. The ink stamp of the binder (Vauthrin Rel[ieur].) is present on the front free endpapers of both volumes. The bookplate of the BPL Bowditch Fund, dated June 11, 1900, is present on both front pastedowns. The perforation stamp of the BPL is present on both title pages. Also present on both title pages are early inscriptions of authorship. All plates are marked with the ink stamp of the BPL. Present on vol. 1, leaf XVIII5, and vol. 2, leaf 27́˜́́ is a Hungarian inscription, in pencil.