" Letter dated 24 December 1665; CEuvres Complåtes, V, 549. no See CEuvres Complåtes, XVIII,48l498. o' G*r"t Complåtes, XVIII,497, Figure 16. " CEurr"t Complåtes, VII,408-4I6. t' I ugree with Leopold that, since we have only Huygens'version of this controversy, Thuret's contribution probably may have been larger than suggested; J.H. Leopold, 'Christiaan Huygens and his instrument makers', in: Sndies on Christiaan Huygens, edited by H.J.M. Bos et a/. (Lisse, 1980), 228. nn Grrrres Complåtes, VII,498. oi CE*re, Complåtes, VII,4l9. ou Gwres Complåtes, VII,425. ot Letters dated l5 and 24 May 1975; (Euvres Complåtes, VIl, 462 and 464. ot Letter dated 7 October 1675; CEuvres Complåtes, VII, 509. nn Letter dated l2 October 1675; (Euvres Complåtes, Vll, 510. to Robert Hooke himself wrote in his diary: 'Zulichems [= Huygens] spring not worth a farthing'(February 20,1675, Old Style); Diary of Robert Hoolee, edited by H.W. Robinson and W. Adams (London, 1935), 148. See for a quite different application of the balance spring by Hooke page l5l. 5' L"tter dated 9 February 1675; (Euvres Complåtes, VII, 405. t' G*r", Complåtes, VII, 542. ti G*r", Complåtes, VlI, 477 . to Letter dated l0 August 1675; CEuvres Complåtes, VII, 489. 5t Letter to H. Justel dated I May 1675 CEuvres Complåtes, VII, 456. 'u Dated l5 August 1679; (Euvres Complåtes, VIII, 197. " Letter to J. Gallois dated I October 1682; (Ewres Complåtes, VIII, 394. 5r Guurer Complites, XVI[, 167 and XVlll, I l4-l l7; see forthe cooperation with Alexander Bruce (?- 168l ) in the tests of 16624 J.H. Leopold (note 60). re The classical source fbr the history of this development is: R.T. Gould, Marine Chronometer - Its History and Development, (London, 1923 and reprinted in later years). An excellent recent survey with a wider scope is The Quest for Longitude, edited by W.J.H. Andrewes, (Cambridge, Mass., 1996). 6o Guure, Complåtes, XVUI, 527. See J.H. Leopold,'The longitude timekeepers of Christiaan Huygens'in W.J.H. Andrewes (note 59), 102-l14. tt S." W.J.H. Andrewes,'Even Newton Could Be Wrong: The Story of Harrison's F'irst Three Sea Clocks, in W.J.H. Andrewes (note 59), 190-191. 62 Quoted in R.T. Gould (note 59), 1960 edition, 5l and 83. u''lf t"e contrast this marvellous machine [Le Roy's watch] with No. 4, which, in its own way, is equally wonderful, Le Roy's superiority as a horologist is evident. Harrison took the escapement, balance, and general arrangement of the ordinary watch of his day, and by fitting a remontoire and maintainer, an automatic regulator, and diamond pallets, aided by high-numbered wheels and pinions and lavish jewelling, he compelled it to become an efficient timekeeper. Le Roy attacked the problem from an entirely different standpoint, and obtained his results not by nullifring detbcts, but by eliminating them. The difference in their machines is fundamental - 39
Harrison built a wonderful house on the sand; but Le Roy dug down to the rock.'; in R.T. Gould (note 59), 1960 edition,90-91. Further informations: hnp://www.antique-horologv.org/_EditoriaVthuretplomp/thuretplomp.htm - tophttp ://www. antique-horolog.y. org/_EditoriaUthuretplomp/thuretplomp.htm : toohttp://www.antique-horolog.v.org/_EditoriaUthuretplomp/thureFlomp.htm - pphttp://www.antique-horolory.org/_EditoriaUthuretplomp/thuretplomp.htm - top 40
- Page 1 and 2: MEDDELELSER FRA OLE RØMERS VENNER
- Page 3 and 4: Til Ole Romers Venner! Læsere af M
- Page 5 and 6: Rapporten har været imødeset med
- Page 7 and 8: og universitetsundervisning. lngen
- Page 9 and 10: være politikernes beslutning. Spro
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- Page 15 and 16: to be used for the measurement of l
- Page 17 and 18: already found their way to that cit
- Page 19 and 20: the little chains in your construct
- Page 21 and 22: 3. Huygens and Thuret in the contro
- Page 23 and 24: The next day, Huygens hears that, a
- Page 25 and 26: made the extra gear necessary. Beca
- Page 27 and 28: This conclusion is relevant in deal
- Page 29 and 30: "igtrrcr 1. Tht' rtl()u(.tll('ttt o
- Page 31 and 32: whether and how to sign the movemen
- Page 33 and 34: for scientists. The developments in
- Page 35 and 36: general and on marine clocks in par
- Page 37: 'n Letter of Christiaan Huygens to
- Page 41 and 42: Pater Hell og Venus-passagen 1769 A
- Page 43: 4EI€ æÆ Ob lerbntion 0Der Stn(r
- Page 46 and 47: En engelsk ekspedition drog til Hai
- Page 48 and 49: den 22. august med en skude, der se
- Page 50 and 51: gunstige forhold; kikkertbilledet s
- Page 52 and 53: 5. kr var dengang de bedste betinge
- Page 54 and 55: Er par citater fra de flg. år turd
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- Page 58 and 59: Newcombs hele undersøgelse virker
- Page 60 and 61: Sajnovics bemærker i sin dagbog, a
- Page 62 and 63: Uddrag af Sajnovicso dagbog Vi bere
- Page 64 and 65: John Robert Christianson : Tycho Br
- Page 66 and 67: (min fremhævelse)". Hun fortsætte
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- Page 70 and 71: Med statens og kirkens bestræbelse
- Page 72 and 73: tanker, som man han sammenfatte i b
- Page 74 and 75: hofpræst, Bruchofen, ville skrive
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- Page 78 and 79: Christianson siger også om Hemmet,
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