{iij} III. (THE STETTIN QUARTO OF 1633.) _Four preliminary unnumbered leaves_, viz., (1) _title._ Tractatus, sive Physiologia Nova | de | MAGNETE, | Magneticisq; corporibus & magno | Magnate tellure, sex libris comprehensus, | a GUILIELMO GILBERTO Colce- | strensi, Medico Londinensi. | ... Omnia nunc diligenter recognita, & emendatius quam ante | in lucem edita, aucta & figuris illustrata, opera & studio D. | WOLFGANGI LOCHMANS, I.U.D. | & Mathematici. | Ad calcem libri adiunctus est Index capitum, Rerum & Verborum | locupletissimus, qui in priore æditione desiderabatur | SEDINI, | Typis GOTZIANIS. | ANNO M.DC. XXXII. || _verso_ blank; (2) Præfatio; (3) Amicorum acclamationes (verses) || _verso_ Claudianus de Magnete (verses); (4) _ibid._ _Sig._ A Ad Lectorem Candidum. _Sig._ A2 _verso_ Ad Gravissimum Doctissimumq. Virum. _Sig._ B2 Verborum quorundam interpretatio; _verso_ blank. _Sig._ B3 is numbered as p. 1, and begins GVILIELMI GILBERTI | DE MAGNETE. | LIBER I. _Sig._ C begins as p. 5; _Sig._ D as p. 13; and so forth. The Collation therefore is: 4 _ll._ unnumbered, A _to_ Mm, _all fours_. Pagination _ends on p. 232, which bears Sig._ H3 _in error for_ Hh3. _Verso of Sig._ Hh3. Errata. Index capitum _begins_ Hh4, _and with_ Index Verborum _extends to verso_ of Mm3. _The last leaf_ [Mm4] _bears the Instructions to binder, with verso_ blank. _There is no colophon, printer's Mark, or date at end. Quarto. Woodcut initials, and diagrams. Twelve etched plates of various sizes inserted._ With the exception of the preliminary matter and the Instructions to binder, the pagination is the same as in the edition of 1628, the pages in the body of the work being reprinted word for word; though with exceptions. For example, p. 18 in Ed. 1633 is one line shorter than in Ed. 1628. The etched plates are entirely different. It has been thought from the pagination being alike that these two editions were really the same with different plates, titles, and preliminary matter. But they are really different. The spacing of the words, letters and lines is different throughout, and there are different misprints. The watermarks of the paper also differ. IV. (THE BERLIN "FACSIMILE" FOLIO OF 1892.) This is a photozincograph reproduction of the London folio of 1600. It lacks the ink emendations on pages 11, 22, 47, &c., found in the original, and is wanting also in some of the asterisks in the margins.