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Titre : Oeuvres complètes de Christiaan Huygens. Correspondance [de Christiaan Huygens], 1666-1669 / publ. par la Société hollandaise des sciences
Auteur : Huygens, Christiaan (1629-1695). Auteur du texte
Éditeur : M. Nijhoff (La Haye)
Date d'édition : 1888-1950
Contributeur : Koninklijke Hollandsche maatschappij der wetenschappen. Éditeur scientifique
Sujet : Huygens, Christiaan (1629-1695) -- Contribution aux mathématiques
Sujet : Huygens, Christiaan (1629-1695)
Notice d'ensemble : http://catalogue.bnf.fr/ark:/12148/cb38949978f
Type : monographie imprimée
Langue : latin
Langue : français
Langue : néerlandais
Format : 23 vol. : ill. ; 29 cm
Description : Correspondance
Description : Autobiographie
Droits : Consultable en ligne
Droits : Public domain
Identifiant : ark:/12148/bpt6k778547
Source : Bibliothèque nationale de France, département Philosophie, histoire, sciences de l'homme, 4-R-788 (6)
Conservation numérique : Bibliothèque nationale de France
Date de mise en ligne : 15/10/2007
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the /<OMg</M~ thereof as exa~Uy as you can by the help of the Rules here prefcribed. 7'7r/?, thereby to corre~ the ~M-t, after that the Longitude of a place fhall have been found at divers times to be the fame, fo that you doubt no more of it. For ail Mapps are very defecûve as to the Scituation of Places in re<pect of ~? and ~?, chiefly where Seas are interpof'd. ~cû~ to be able always to know in the profecution of your lourney, how farr you have fail'd from any place to thejE~/? or ~!?/?. And ifby any notable mifchance or care!e(sne(s att the Watches fhould come to ftand (HU, yet you may at any place, whereof the Longitude is certainly known, fet them a going again, and adjuft them there by the Sun, and fo reckon the Longitudes from that fame Meridian. For, you are to know, that you are not at ail oblig'd to put one MrM~ Meridian of any knowne place as a beginning of the Longitude-reckoning; this hapening only in ./Mo~or Tables o f jLo~g</M~e As, when you take for that purpofe the Meridian of the Pico in 7~A' or that of the Iflands of Corvo and ~YorM (the moft Weiterly of the ~zo~'M) or any others. Yet it were very fit, that atl Geographers agreed and pitched upon one and the fame -F/r/? Meridian, that fo atl places might be known by the fame Degrees as well of Longitude as of Latitude; though in Voyaging it is (umcient, to obferve only the différence of Longitudes, beginning to reckon from the Meridian of any place, you pleafe, as if it were the firfl.
la.
If it happen, that being at Sea att the Watches ftopp, you muft, as fpeedily as is po(nb!e, fet them a moving again, that you may know, how much you advance from that place towards the jE~/? or ~c/7: Which is of no finall importance, fince for want of this knowledge, you are fometimes by the force of Curret1ts fo carried away, that though you faile before the ~?/ yet you are driven a Stern, of which there are many Examples.
i3.
The M~/M~o/'<? ybM~M//b~ the ~?/cAey.
The Watches being diningnitt by marks as A. B. or the like, every day about Noon, or when mott conveniently you can, obferve the time of the day by the Sun or by the ~~Ty at night,andfubdu6tthence the w/MM~and/cco~, that are adjoynM to that day in the Table, and write the rcmainder down in a paper, wherein o. Co/ww or more are mark't, placing them in the~co/ cotumn, having plac'd thé day of thé ~7<w//t in the And at the famé time write down the hours, minutes and féconds of each Watch in a dinin~co!umn,aUoppouteone