Memoir on a New and Certain Method of Ascertaining the Figure of the Earth by Means of Occultations of the Fixed StarsR. and A. Taylor, 1819 - 44 pages |
From inside the book
Results 1-5 of 9
Page 6
... comparing the calculation with the observation ) the errors of the tables in the longitude and latitude of the moon , mixed ( as we have already stated ) with the preceding errors * . In the present state of astronomy I do not see any ...
... comparing the calculation with the observation ) the errors of the tables in the longitude and latitude of the moon , mixed ( as we have already stated ) with the preceding errors * . In the present state of astronomy I do not see any ...
Page 14
... comparing it with the arc then measured in France . But , M. Svanberg who , in 1805 , remeasured the same arc , deduces the compression = 3074 when compared with the arc recently measured in France ; and 3235 when compared with that of ...
... comparing it with the arc then measured in France . But , M. Svanberg who , in 1805 , remeasured the same arc , deduces the compression = 3074 when compared with the arc recently measured in France ; and 3235 when compared with that of ...
Page 15
... comparing the whole of his arc with the whole of the French arc , the compression would be . A remarkable discor dance in the results . The measurement of Lacaille , at the Cape of Good Hope , compared with that at the equator , gives T ...
... comparing the whole of his arc with the whole of the French arc , the compression would be . A remarkable discor dance in the results . The measurement of Lacaille , at the Cape of Good Hope , compared with that at the equator , gives T ...
Page 17
... compared ; and by which ( as I have said ) the errors of the tables are corrected , and the geographical longitude deter- mined . § 16. It is true that the conditions here required , for ascertaining the flattening of the poles , cannot ...
... compared ; and by which ( as I have said ) the errors of the tables are corrected , and the geographical longitude deter- mined . § 16. It is true that the conditions here required , for ascertaining the flattening of the poles , cannot ...
Page 29
... compared with others of a similar kind . It is much to be lamented , however , that in this country there is no association of scientific persons formed for the encouragement and improvement of Astronomy . In almost all the other ...
... compared with others of a similar kind . It is much to be lamented , however , that in this country there is no association of scientific persons formed for the encouragement and improvement of Astronomy . In almost all the other ...
Other editions - View all
Memoir on a New and Certain Method of Ascertaining the Figure of the Earth ... Antonio Cagnoli,Francis Baily No preview available - 2009 |
Memoir on a New and Certain Method of Ascertaining the Figure of the Earth ... M. (Antonio) Cagnoli No preview available - 2012 |
Common terms and phrases
accurate advantage alluded Année apparent path appears arise Ascension and Declination astro astronomers Astronomical Society Barcelona Board of Longitude Cagnoli calculations chord circumstances compared Connaissance des Tems consequently cultations D's disc dark limb deduce determining the true different latitudes dura duration earth earth's axis earth's radius earth's surface effect emer ences Ephemerides errors Evaux feet FIXED STARS FRANCIS BAILY hitherto hypotheses Ibid illuminated side immersion and emersion labours Latitude 70 length line MV longitude Maupertuis meridian Messier METHOD OF ASCERTAINING mode moon's disc moon's parallax nomy object oblate spheroid observations occultation of Aldebaran parallax of height perfect sphere perpendicular phænomenon Pingré plumb-line polar axis poles precise quantity present produce a difference proposed public attention purpose recent measurement rendered Right Ascension scientific semidiameter sion spect star's passing sufficient supposition telescope terrestrial radii tion true figure variation of curvature vation vertical circle Zodiacal stars
Popular passages
Page 1 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Page 33 - Pounds in any one Year, towards the making, correcting, or publishing any such Experiments, Modes, Observations, Calculations, or Tables. VII. And whereas it is expedient that the said Commissioners should be enabled to cause to be ascertained, as accurately as may be, the Latitude and Longitude of Places whereof the exact Situation hath not been already sufficiently ascertained ; Be it enacted. That they may expend or cause to be expended any Sum not exceeding in the whole One Thousand Pounds in...
Page 20 - ... that yearly happen, may be readily shown. Indeed, most of the lunar occultations, where the star is of sufficient magnitude for observing its immersion and emersion correctly, are equally fit for the purpose here proposed to some parts or other of the globe. And as Cagnoli very justly observes : — " It is in the power of every principal academy materially to assist in such a discovery, by two methods. First, in regard to times past, to collect together, from all quarters, the observations of...
Page 33 - ... said Commissioners should be enabled to expend certain Sums towards making Experiments of Instruments, Modes, or Proposals, and for making and publishing Observations, Calculations, and Tables for ascertaining the Longitude, or towards improving or correcting such as may have been already made, or for other Purposes useful to Navigation; Be it enacted, That they may pay or expend any Sum or Sums of Money, not exceeding One...
Page 21 - Secondly, w ith respect to the future, to insert in the ephemerides accurate ill notices of. those placee or districts where it would be most important that any occultation should be observed (particularly of the principal stars) in order that it might serve to apprise and excite the attention of such astronomers as might be favourably situated themselves, or contiguous to more advantageous situations.
Page 1 - Memoir on a New and Certain Method of Ascertaining the Figure of the Earth by means of Occultations of the Fixed Stars.
Page 33 - ... Observations, Calculations, or Tables. VII. And whereas it is expedient that the said Commissioners should be enabled to cause to be ascertained, as accurately as may be, the Latitude and Longitude of Places whereof the exact Situation hath not been already sufficiently ascertained ; Be it enacted. That they may expend or cause to be expended any Sum not exceeding in the whole One Thousand Pounds in any one Year for such Purpose. VIII. And whereas it may happen that Proposals, Inventions, and...
Page 33 - ... publishing Observations, Calculations, and Tables for ascertaining the Longitude, or towards improving or correcting such as may have been already made, or for other Purposes useful to Navigation; Be it enacted, That they may pay or expend any Sum or Sums of Money, not exceeding One Thousand Pounds in any one Year, towards the making, correcting, or publishing any such Experiments, Modes, Observations, Calculations, or Tables.
Page 34 - ... moderate Rewards upon the Person or Persons who may have made such Proposal, Invention, or Correction ; Be it therefore enacted, That the said Commissioners may pay or cause to be paid such Sum not exceeding...
Page 8 - ... if there be no variation in the curvature of the earth's surface, the duration will be only 8m.