PH. Et compertiffima omnibus hæc Asbefti vis, vt femel accenfus ex eo ignis numquam reftinguatur: namn Diuus Auguftinus rerum omnium peritia illuftris de eo quoque pluribus agit de Ciuit Dei lib.1.cap. 5. & cap.6. Recolit enim Veneris templo adhibitum cum lucerna candelabrum,quæ fub dio cum noctu, dieque arderet,nulla tamen tempeftate, nullis imbribus extingui potucrat. Vnde neceffarium fuit conijcere,ficut lapis, ita lucerna quoque, ac lychnus ex Asbefto conftarent. Propterea de illo ipfo Fano Veneris,ac lucerna inextinguibili (inquit) ita fentimus, vt in ea mechanicum aliquid de Asbesto ars humana molita fit: aut arte magica factum fit, quod homines illi mirentur in templo; aut damon quifpiam fub nomine Veneris tanta fe efficacia præfentauit,vt hoc ibi prodigium & appareret hominibus,& diutius perma neret. Hæc ille ex veterum annalibus. Cum igitur ea tanta Asbe fti vis etiam Diuo Auguftino pro comperta habeatur,non eft,quod de ea ambigamus, fed rei rationem eft impoffibile affequi humano ingenio: diuinum id miraculum in lapide hoc inditum cenfendum eft. Sed de lapidum naturis cum igne fat,fuperque diximus: nunc ad alios lapides conuertenda noftra oratio eft; primumque de Ma gnete. E Q. Magnes præ cæteris omnibus naturæ arcana multa continet, neque ad integrum vis eius humano generi comper ta eft, vt cenfeo: propterea de ipfo folo librum fcripfit doctiffimus Ioannes Baptifta à Porta Neapolitanus, longe plures, quam tentenos eius effectus enamerans incredibili folertia, & obferuatione. TH. Dabio procul nemo mente affequi eius naturam,vimque, ac rationem umquam potuit ad integrum: præfertim qua ratione ferrum fua natura grannfimum ad fe leuiffime trahat: propterea virtute cælefti id illi effe inditum, nulla autem elementali vi tradút fancti viri,& in ijs præcipuus Diuus Thomas Aquinas quodlib. 12. art. 15. Quamobrem ne fruftra difquirenda eius rei caufæ incumbamus, quam affequi non valeamus, differendum puto de rebus memorabilibus, quæ ob cam Magnetis vim acciderunt. PH. Exordiri hibet ab eiuş lapidis origine,vbi inuentus primu: tradunt in Ida monte repertum primum ab homine, vnde nomen accepit, Magnete nuncupato, vt Nicander teftatur, ac Plinius lib. 36. cap.16. Inueniffe enim eum narrat ob clauos ferreos crepidarum, & baculi cufpidem ferream, cum folo nimis velut tracta hæ rerent, cum armenta pafteret. Id quoque fcribit Ifidorus lib.16. cap.4. qui & illud adijcit, ferrugineum colorem illi effe, atq; ideo ferrum apprehendere, velut cognatione natura comple&endums 70.* MAIOLUS. (Reduced.) attra 72k.†--William Gilbert of Colchester. A sketch of his magnetic philosophy. By Charles E. Benham. 103 pp., 2 plates. Sm. Colchester, 1902 4to. 721.†——Gilbert, Physician: A note prepared for the three-hundredth A biographical sketch, with especial reference to Gilbert's career as physician. 72m.†——William Gilbert, and terrestrial magnetism in the time of Queen Elizabeth: A discourse by Silvanus P(hillips) Thompson, F.R.S. 16 pp. Sm. 4to. Chiswick press. London, 1903 A paper read before the Royal Geographical Society, March 23, 1903. Includes an interesting account, with bibliographical references, of the knowledge of the compass to the time of Gilbert. 72n.t――The family and arms of Gilbert of Colchester. By Silvanus P(hillips) Thompson (Reprint, Transactions Essex Archeological Society, vol. ix, 1904.) 15 pp., I plate, genealogical chart, ill. 4to. London, 1904 The A paper read before the Essex Archeological Society at its Jubilee. genealogy commences with Thomas Gilbert, a burgess of Colchester, born 1428. An appendix gives a list of the considerable property possessed by Gilbert at his death. -See also 131. 73. Sunde, Janus Hercules de. (pseud. of Daniel Schwenter.) (1585 1636.) Steganologia & Steganographia aucta, Geheime, Magische, Natuerliche Red- unnd Schreibkunst. 121.+370 pp.+61. ill. 16mo. Nuernberg, Simon Halbmayers. Nuremberg, (1600) This rare book gives a lengthy and interesting description of magnetic signaling, p. 127; the operator calls up his friend by ringing a bell by means of a bar-magnet; the needles are also moved by bar-magnets and the letters formed by one or more strokes to the right and the left as in the modern needle telegraph. Signaling by means of mirrors, p. 136. The date given above is from the Catalogue of the British Museum. (See Nos. 90, 190, 193.) -See also 110 bis. 74. Blundeville, (Thomas). (1530 (?) —.) The theoriques of the seuen planets, shewing all their diuerse motions, and all other accidents, called Passions, thereunto belonging. Whereunto is added by the said Master Blundeville a breefe extract by him made of Maginus his Theoriques, for the better understanding of the Prutenical tables, to calculate thereby the diuerse motions of the seuen planets. There is also hereto added, The making, description, and use of two most ingenious & necessarie instruments for sea-men to find Quò propiores fuerint partes æquinoctiali,cò magis obliquè alliciunt magnetica: at polis viciniores partes magis directè aduocant, in polis dire&tiffimè. Eadem etia ratio eft conuerfionis magnetuomnium qui funt rotundi & qui funt longi,fed in longis experimentum eft facilius. Nam in quâuis formâ eft verticitas, & funt poli; fed propter malam formam & inæqualem, fæpiùs quibufdam malis impediuntur. Si lapis longus fuerit, vertex verò in finibus, non in lateribus; fortiùs in vertice allicit. Conferunt enim partes vires fortiores in polum rectis lineis, quàm obliquis. Sic lapis, & tellus naturâ conformant motus magneticos. CAP. VII. De potentiâ virtutis magneticæ, & naturâ in orbem extenfibili. Vnditur virtus magnetica vndequaque circa corpus magneticum in orbem; circa terrellam fphærice'; in alijs lapidum figuris, magis confufè & inæqualiter. Nec tamen in rerum natura fubfiftit orbis, aut virtus per aërem fufa permanens, aut effentialis; fed mag ncs 72. GILBERT. (Reduced.) |