[20] Reference to Galileo and his attempts to solve the problems relative to the determination of longitude may be found in Kästner, A. G. _Geschichte der Mathematik, 1796, vol. IV, p. 207_; Galileo Galilei: _Opere, III, p. 142_; Baudet, _pp. 131-145_. [21] See _Extract uit de Resol. der Staten van Holland en West-Vriesland, 5 Aug., 1608_, given by Baudet, _pp. 156-158_. [22] See p. 58 for specific reference to some of the many striking similarities, which seem to give conclusive evidence that Hondius borrowed from Blaeu. [23] See Baudet, P. J. H. _Naschrift op. Leven en werken van W. Jz. Blaeu, pp. 15-18._ [24] The inscriptions in the original Dutch are given by Baudet: _Naschrift, pp. 16-17_. [25] An extract from the Resolution is given by Baudet, _p. 156_. [26] Baudet says: “I am unable to determine whether the _World Map_ of 1605 and the _Mappa Mundi_, in two hemispheres, of that year, as referred to in the resolution of the States General, are the same. I believe, however, that the _World Map_ is the ‘Nova totius terrarum orbis geographica ac hydrographica tabula, auct. Guiljelmo Blaeuw,’ drawn according to Mercator’s projection, to be found in the ‘Toonneel des Aerdrycx.’ It is not dated, but apparently was printed from a plate which had been used in 1606, though improved somewhat, but from it the date had been erased, which however, according to Lelewel, is slightly visible “on some copies.” See Baudet, _pp. 85-86_. The “Nova totius terrarum” is reproduced, _p. 52_. [27] See Baudet, _pp. 96-98_, for extracts from his letters to Schickard. [28] See Fiorini, Matteo. _Sfere Terrestri e Celesti di autore Italiano oppure fatte o conservate in Italia_. _Roma, Presso la Società Geografica Italiana, 1898_; Günther, Sigmund. _Erd- und Himmelsgloben, ihre Geschichte und Konstruktion, nach dem Italienischen Matteo Fiorinis frei bearbeitet. Leipzig, 1895._ [29] Ravenstein, E. G. _Martin Behaim; his life and his globe._ _London, George Philip Son, Ltd., 1908._ Contains a facsimile of the globe printed on four sheets. [30] Fischer, Jos. S. J. and Wieser, Prof. Franz V. _The Oldest Map with the name America of the year 1507 and the Carta Marina of the year 1516 by M. Waldseemüller (Ilacomilus), Innsbruck, 1903. See p. 14._ [31] Van Raemdonck, D. J. _Les sphères terrestre et céleste de Gérard Mercator [1541-1551]. Notice publiée à l’occasion de la reproduction de ses sphères à l’aide de facsimile de leurs fuseaux originaux, gravés par Mercator et conservés à la Bibliothèque Royale à Bruxelles. Saint-Nicolas, 1875._ [32] Fiorini, _op. cit._, _pp. 192-199_. [33] Fiorini, _op. cit._, _pp. 262-272_. [34] Fiorini, _op. cit._, _pp. 229-262._ [35] Fredrik Houtman, astronomer and navigator, sailed with his brother Cornelius Houtman to the East Indies in the years 1599 and 1600.