Their longitudesincrease at the annual rate of 50 seconds, but their latitudes vary very little.
But the first statement is singularly unfortunate.
But from the moment when he turned eastward on his first voyage he seems to have made up his mind that Toscanelli's longitudes needed serious amendment.
It had not preserved the rate with which we started from the Dalles, and this will account for the absence of longitudes along this interval of our journey.
All the longitudes on the line of our outward journey, between St. Vrain's fort and the Dalles of the Columbia, which were not directly determined by satellites, have been chronometrically referred to this place.
The rate of this watch was irregular, and I place little confidence in the few longitudes which depend upon it, though, so far as we have any means of judging, they appear tolerably correct.
In 1847 the relative longitudes of New York, Philadelphia, and Washington were determined by means of the electric telegraph by Messrs.
Not that it varies with the radius; the geometers are right enough on that point: but it varies with the time, in a manner depending upon the difference of the true longitudes of the Sun and Moon.
This correction has been made in all the longitudes taken by us in the dangerous Archipelago.
Our longitudes were fixed by good chronometers, which having been regulated at Cape Venus, could not in so short a time have made any important error.
All the longitudes in the dangerous Archipelago which I have given, (without entering into the manner in which they were calculated,) are made out by means of the chronometer.
This, on arriving at O Tahaiti, was found six minutes fifty seconds wrong; and the longitudes here given have been rectified accordingly.
The determination of longitudes has from the beginning been environed with almost insuperable difficulties.
It is hardly necessary to add that the forces governing the variation of the needle, both local and general, are so inconstant that the hope of fixing longitudes by it was long since abandoned.
The movements of the satellites of Jupiter are not by any means so simple as the immortal inventor of the method of longitudes supposed them to be.
Heliographic longitudes and latitudes of spots on the sun's surface are analogous to geographic longitudes and latitudes of places on the earth.
It is a remarkable fact, however, that the longitudes of their perihelia differ by almost exactly 180D.
An inspection of the column containing the longitudes of the ascending nodes, in Table II.
Their initial longitudes may have been any longitudes whatever; but their mean motions were different and they have revolved for so long a time that we may say they are now distributed at random along the zodiac.
Apart from any of the methods mentioned it seems to have been overlooked that Bering might have corrected the longitudes of the N.
To get the approximate Greenwich longitude 67° should be added to the longitudes in the table which are reckoned from Tobolsk.
This would be a sufficient starting point and is quite as correct as Bering's determinations; in fact is within a few miles of the modern longitudes for the same part of the peninsula.
In the Table of positions the addition of 67° will reduce the longitudes to E.
In the northeastern part of the chart, the latitudes are exaggerated and the longitudes contracted in a very erroneous manner.
Owing to the difficulty of determining the exact time of the first and last contacts the longitudes computed by these observations were liable to quite as great inaccuracy as those computed from the lunar tables.
The situations of the following places, which were either fixed by us or adapted from other authorities, served as the basis of the chronometrical determination of the longitudes of the intermediate parts.
Hansen's table of the moon, and was published as a paper relating to the transit of Venus, because these corrections were essential in determining the longitudes of the stations by observations of the moon.
Lord Valentia himself admits that several of Bruce's latitudes and longitudesare correct; but he also asserts that others are incorrect, and that some are even copied from Niebuhr.
These differences are apt to create much confusion in the longitudes of places, when not explained by the writers who use these several modes of reckoning; on which account Lewis XIII.
To say nothing of the greater length and difficulty of passing round Cape Horn, rather than the Cape of Good Hope, the difference in longitudes is sufficient to establish the absolute contrary of the position in the text.
In this case, too, it is difficult to determine exactly the longitudes between which the coast-line thus designated is situated.
When the Bureau of Longitudes was created in 1795, the preparation of the work was intrusted to it, and has remained in its charge until the present time.
We may, therefore, hope that all commercial nations will, before long, refer their longitudesto one and the same meridian, and the resulting confusion be thus avoided.
They gave thelongitudes of the planets, the position of the sun, the time of rising and setting, the prediction of eclipses, etc.
All our interior longitudeshave been and are determined differentially by comparison with some point in this country.
A third party determines the longitudes of, let us suppose, St. Louis from Washington, he adds the assumed longitudes of Washington from Greenwich which may not agree with either of the longitudes of Cambridge and gets his longitude.
If their navigators do not do so but refer their longitudes to the meridian of Greenwich, then their almanacs must be as good as useless.
Had our navigators referred their longitudes to any meridian of our own country the arrangement of the work need not have differed materially from that of foreign ones.
It was hardly practicable to referlongitudes in our own country to any European meridian.
I do not know whether the Portuguese navigators really reckon their longitudes from this point: if they do the practice must be attended with more or less confusion.
The astronomical values of the geographical longitudes (with regard to Greenwich) are assumed, according to the compensation of longitude differences carried out by van de Sande Bakhuyzen (Comp.
With the concluding calculation of these operations, newer determinations of differences of longitudes were also applicable, by which the number of stations was brought up to 29.
Three different methods have successively been used in the determination of longitudes of distant places.
Longitudes in the western part of the Caribbean Sea depended upon the position of the Morro lighthouse at Havana, which had been determined by occultations.
Lisbon seemed to afford the most convenient place to start from, but its longitude had never been determined by telegraph and it was decided to request the French Bureau of Longitudes to coöperate by making this measurement from Paris.
The two longitudes of Cordova, as brought from Greenwich by the two routes, differed from each other by only 0^{s}.
Martinique and Guadeloupe in the Windward Islands had been surveyed by French officers who based their positions upon longitudes derived from moon culminations.
A paper was read entitled, "Telegraphic Determinations of Longitudesby the Bureau of Navigation," by Lieutenant J.
The one most used and giving the best results was that in which a number of chronometers were transported back and forth between two places the difference of whose longitudes was required.
Latitudes from the observations of travellers may generally be trusted, but longitudes should be accepted with caution; for so competent an observer as Captain Speke placed the capital of Uganda in longitude 32 deg.
A few latitudes had indeed been observed, but although Hipparchus had shown how longitudes could be determined by the observation of eclipses, this method was in reality not available for want of trustworthy time-keepers.
These corrected longitudes were not yet available for the maps produced by Nicolas Sanson of Abbeville, since 1627.
The longitudes are referred to the mean terrestrial equinox, and t is the time in years from 1900.
Laplace that if the longitudesand mean motions were such that the angle U differed a little from 180 deg.
The most marked feature of these bodies is a relation between the mean longitudes of Satellites I.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "longitudes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
