72g.t--William Gilbert of Colchester, Physician of London, on the loadstone and magnetic bodies, and on the great magnet, the earth. A new physiology demonstrated with many arguments and experiments. A translation by P. Fleury Mottelay. 54 +368 pp. 8vo. New York, 1893 Reduced reproduction of title-pages of 1600, 1628 and 1633 editions. Frontispiece portrait. Gilbert's arms. Biographical memoir, with Address of Edward Wright. Reduced reproduction of title-page of Gilbert's De Mundo Nostro of 1651. (See No. 131.) This is the first complete translation of Gilbert's De Magnete into a modern language. The foot-notes are numerous and of considerable historical and bibliographical value. Mr. Paul F. Mottelay is the author of a valuable Bibliographical History of Electricity and Magnetism which will soon appear in book form.

72h.t--William Gilbert of Colchester, physician of London. On the Magnet, and on the great magnet, the earth; a new physiology demonstrated by many arguments and experiments. (Translation by the Gilbert Club.) 246 pp., ill. Large 8vo. Imprinted at the Chiswick Press, anno MCM.

London, 1900

The Gilbert Club was formed under the presidency of Sir William Thomson (Lord Kelvin) for the purpose of preparing a translation of Gilbert's De Magnete. Following are the names of those who took part in the translation or revision: Rev. A. W. Howard, Mr. G. T. Dickin, Mr. Edward Little. Prof. R. A. Sampson, Prof. Meldola, Mr. Latimer Clark, Sir B. W. Richardson, Rev. W. C. Howell, Prof. Silvanus P. Thompson, Dr. Joseph Larmor. This version is, as far as circumstances permitted, a facsimile in English of the original Latin folio edition of 1600. The translation corresponds page for page; the cuts and the ornamental initial letters have been either recut or reproduced in facsimile. A short index has been added to facilitate consultation. The edition was limited to 250 copies.

72i.f--Notes on Gilbert's De Magnete. (By Prof. Silvanus P. Thompson, F.R.S.) Privately printed. London, MCMI. 68 pp. Large 8vo.

London, 1901

Valuable literary, historical, geographical and bibliographical notes, including
many references to works of authors quoted by Gilbert and to other writings
of related interest, with a detailed bibliography of De Magnete.
On p. 52
is a reproduction of the original engraving followed by the artist who
prepared the cut in De Magnete, representing a blacksmith at his forge, and
which was re-engraved, with changes, for the 1628 and 1633 editions. The
Notes are bound with copies of the translation of De Magnete issued to
members of the Gilbert Club.

72j.†——Gilbert of Colchester. The tercentenary of electric and mag-
netic science. 14 pp., frontispiece portrait, ill. By Brother
Potamian, D.Sc. (Reprint, Popular Science Monthly, Sep-
tember 1901.) 8vo.
New York, 1901

Biographical sketch with criticism of Bacon's belittling remarks; parallel between Gilbert and Bacon; analysis of Gilbert's work in electricity, magnetism and terrestrial magnetism. "If any one deserves to be called the founder of the experimental school of philosophy, we contend that it is not Bacon the thinker and essayist, but Gilbert the methodical worker and fruitful discoverer."

PH. Eft compertiffima omnibus hæc Asbesti vis, vt femel accenfus ex eo ignis numquam reftinguatur: nam 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, dicque 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 enumerans incredibili folertia, & obfcruatione.

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 sancti viri,& in ijs præcipuus Diuus Thomas Aquinas quodlib. 12. art. 15. Quamobrem ne fruftra difquirendæ eius rei caufæ incumbamus, quam affequi non valeamus, differendum puto de rebus memorabilibus, quæ ob eam 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, cun 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.t--William Gilbert of Colchester. A sketch of his magnetic philosophy. By Charles E. Benham. 103 pp., 2 plates. Sm. Colchester, 1902

4to.
A popular sketch of Gilbert and his philosophy: "The man, wherein his
genius lay, his faults and failings, the essential qualities of his work without
a laborious following out of his innumerable experiments and arguments."
A full-page representation is given of Gilbert's tomb in Holy Trinity Church,
Colchester.

721.†--Gilbert, Physician: A note prepared for the three-hundredth
anniversary of the death of William Gilbert of Colchester,
president of the Royal College of Physicians, & physician to
Queen Elizabeth, by Silvanus P(hillips) Thompson, F.R.S.
32 PP Sm. 4to. Chiswick press.
London, 1903

A biographical sketch, with especial reference to Gilbert's career as physician. 72m.t--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

In

A paper read before the Royal Geographical Society, March 23, 1903. cludes an interesting account, with bibliographical references, of the knowledge of the compass to the time of Gilbert.

72n.†--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

A paper read before the Essex Archeological Society at its Jubilee. The 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. 12 1.+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

71. WRIGHT.