scholarly journals XLIII. Astronomical observations, made in the forks of the River Brandiwine in Pennsylvania, for determining the going of a clock sent thither by the Royal Society, in order to find the difference of gravity between the Royal Observatory at Greenwich, and the place where the clock was set up in Pennsylvania; to which are added, an observation of the end of an eclipse of the Moon, and some immersions of Jupiter's first satellite observed at the same place in Pennsylvania: By Charles Mason and Jeremiah D

1768 ◽  
Vol 58 ◽  
pp. 329-335 ◽  
Keyword(s):  
Royal Society ◽  
The Moon ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Difference ◽  
Set Up ◽  
The City ◽  
Made In

The place where these observations were made is the northernmost point of the lines that were measured for a degree of latitude, or Point N. (see Tab. XIII. fig. 2.) relative to that measure; it lies 31 miles west, by measurement; and 10", 5 south of the southernmost point of the city of Philadelphia, as found by the sector.

scholarly journals IX. Experiments to determine the difference in the number of vibrations made by an invariable pendulum in the Royal Observatory at Greenwich, and in the house in London in which Captain Kater’s experiments were made

1829 ◽  
Vol 119 ◽  
pp. 83-102 ◽  
Keyword(s):  
Royal Society ◽  
Knife Edge ◽  
Capillary Action ◽  
Royal Observatory ◽  
The Difference ◽  
Made In

These experiments were made in compliance with a wish of the Council of the Royal Society, expressed in the following minute, dated December 13th 1827: “That Captain Sabine be requested to ascertain the difference in the number of vibrations of a pendulum between Mr. Browne’s house in London and the Royal Observatory at Greenwich.” The invariable pendulum employed to accomplish the proposed object was of the usual materials and form, new for the occasion, and numbered 12. The thermometer was the same that I had used in my former pendulum experi­ments; its graduation is described in the volume containing the account of those experiments, pages 182—187. The ball of the thermometer was sus­pended at both stations midway between the knife edge and the centre of the weight of the pendulum. The height of the barometer in the observations at Greenwich was taken by the standard barometer of the Observatory, which is in a room on the same floor as the pendulum room: in those at London it was taken by Mr. Browne’s barometer placed in the room in which the observa­tions were made. Mr. Browne’s barometer being compared with the standard of the Greenwich observatory, by means of an intermediate portable barometer, was found to require a correction of + 0.066 to make it agree with the indications of the Greenwich standard corrected for capillary action. This correction is consequently applied.

scholarly journals Experiments to determine the difference the number of vibrations made by an invariable pendulum in the royal observatory at Greenwich, and in the house in London in which Captain Kater’s experiments were made

1833 ◽  
Vol 2 ◽  
pp. 360-360
Keyword(s):  
Royal Society ◽  
Royal Observatory ◽  
The Mean ◽  
The Difference ◽  
The Times ◽  
Theory And Experiment ◽  
Made In

The experiments of which an account is given in this paper, were made in compliance with a request of the Council of the Royal Society, made in December 1827, that Captain Sabine would ascertain the difference in the number of vibrations of a pendulum at Mr. Browne’s house, and at the Greenwich Observatory. The author gives a description of the instruments used in the observations; the first series of which were made in Mr. Browne’s house, from the 17th to the 20th of March inclusive, and gave as the mean result, 85963·60 vibrations in a mean solar day. A reduction is here introduced, derived from some experiments made on the difference which takes place in the times of vibration in vacuo and in air; the number of vibrations in the former case being, under the same circumstances as in the observations, 9·97 per diem less than in the latter. A corresponding series made at Greenwich in May, gave as the mean 85964·17 vibrations, thus indicating an acceleration of 0·57 vibrations per diem , but the difference of latitude and of height between the two stations would have led us from theory to expect a total retardation of 0·38 vibration in the same time. From a second set of observations at Greenwich, the diurnal acceleration appeared to be 0·52 vibration. Taking the mean of this and the former result, it appears that the total amount of the discordance between theory and experiment is 0·91 vibration per diem . The stations are conveniently situated for verifying the existence of this anomaly, and its magnitude is such as to preclude all uncertainty as to its existence. With regard to its cause, the author is confirmed in the opinions he formerly entertained on this subject. Tables are subjoined, containing accounts of the rate of the clocks used at both stations, and of the particulars of each series of observations.

Majolica in the Early Colonial Andes: The Role of Panamanian Wares

2001 ◽  
Vol 12 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Ross W. Jamieson
Keyword(s):  
Spanish Colonial ◽  
Important Indicator ◽  
The Andes ◽  
Early Colonial ◽  
The Pacific ◽  
Elite Status ◽  
Set Up ◽  
The City ◽  
Made In

As one of the most common artifact categories found on Spanish colonial sites, the wheel-made, tin-glazed pottery known as majolica is an important chronological and social indicator for archaeologists. Initially imported from Europe, several manufacturing centers for majolica were set up in the New World by the late sixteenth century. The study of colonial majolica in the Viceroyalty of Peru, which encompassed much of South America, has received less attention than ceramic production and trade in the colonial Caribbean and Mesoamerica. Prior to 1650 the Viceroyalty of Peru was supplied with majolica largely produced in the city of Panama Vieja, on the Pacific. Panama Vieja majolica has been recovered from throughout the Andes, as far south as Argentina. Majolica made in Panama Vieja provides an important chronological indicator of early colonial archaeological contexts in the region. The reproduction of Iberian-style majolica for use on elite tables was symbolically important to the imposition of Spanish rule, and thus Panamanian majolicas also provide an important indicator of elite status on Andean colonial sites.

scholarly journals XIX. On the difference of meridians of the Royal Observatories of Greenwich and Paris

1827 ◽  
Vol 117 ◽  
pp. 286-296 ◽  
Keyword(s):  
The Other ◽  
Detailed Account ◽  
Sidereal Time ◽  
Methods Of Calculation ◽  
Royal Observatory ◽  
The Difference ◽  
Made In

In the Philosophical Transactions for 1826, Part II. Mr. Herschel has given a detailed account of observations, which were made in the month of July, 1825, for the purpose of ascertaining the difference of the meridians of the Royal Observatories of Greenwich and Paris, with a computation of these observations, from which the most probable value of the difference of longitude appears to be 9 m 21 s. 6. But I have perceived that in the copy of the observations delivered to him from the Royal Observatory of Greenwich, an error of one second has been committed; as the true sidereal time of the observation made there on 21st July, ought to be 17 h 38 m 57·12 in place of 17 h 38 m 56 s. 10, set down in the Table p. 104, which he informs me was computed at the Observatory, and officially communicated to him from the Astronomer Royal. This error seems to have had its origin in the little Table at the bottom of page 103; for, on subtracting the error of the clock, 47 s. 37, from the time 18 h 8 m 30 s. 40, the true sidereal time is 18 h 7 m 43 s. 03, instead of 18 h 7 m 42 s. 03, there given. The error in the result of that day’s observations, arising from this cause, has been partly compensated by a mistake of three tenths of a second, which has occurred in calculating the combined observations of the same day, the gain of mean on sidereal time being stated to be — 4 s. 54 (pp. 120 and 122), in place of — 4 s. 24. On checking the other observations, a few trifling alterations appear to be necessary upon the Greenwich Table of sidereal time, from the data given along with it. These seem to be occasioned by different methods of calculation, and indeed are hardly worthy of notice. The French astronomers not having given the data on which the calculations of the sidereal times at Paris are founded, they are assumed to be correct.

scholarly journals XXXIV. Observations on the transit of Ve­nus, June the 6th, 1761, made in Spital-Square; the longitude of which is 4' 11" west of the Royal Observatory at Green­wich, and the latitude 51° 31' 15" north

1761 ◽  
Vol 52 ◽  
pp. 182-183
Keyword(s):  
The Sun ◽  
Royal Observatory ◽  
The Mean ◽  
The Difference ◽  
Made In

Having measured the diameter of Venus, on the sun, three times, with the object-glass micrometer, the mean was found to be 58 seconds; and but 6/10 of a second, the difference of the extremes.

scholarly journals XIII. Results deduced from the measures of terrestrial magnetic force in the horizontal plane, at the Royal Observatoy, Greenwich, from 1841 to 1876

1885 ◽  
Vol 176 ◽  
pp. 679-689
Keyword(s):  
Royal Society ◽  
Horizontal Plane ◽  
Magnetic Force ◽  
Proper Part ◽  
Royal Navy ◽  
Sliding Windows ◽  
Short Statement ◽  
Royal Observatory ◽  
Real Progress ◽  
Made In

In offering to the Royal Society some results deduced from the systems of magnetic observation and magnetic self-registration established several years since at the Royal Observatory, Greenwich, during a portion of the time in which I presided over that institution, I think it desirable to premise a short statement on the origin of the Magnetic Department of the Royal Observatory, and on the successive steps in its constitution. It appears to have been recognised many years ago, that magnetic determinations would form a proper part of the business of the Royal Observatory. When I commenced residence at the Royal Observatory, at the end of 1835, I found in the garden a small wooden building, evidently intended for the examination of compasses, perhaps of the size of those used in the Royal Navy. But the locality was inconvenient, and the structure was totally unfit for any delicate magnetic purpose; for instance, the balance-weights of the sliding windows were of iron. For some preliminary experiments a small observatory was borrowed from Captain Fitzroy, but no real progress was made in magnetism.

scholarly journals Observing the skies of Lisbon. Isaac de Sequeira Samuda, an estrangeirado in the Royal Society

2014 ◽  
Vol 68 (2) ◽  
pp. 135-149 ◽  
Author(s):  
Carla Costa Vieira
Keyword(s):  
Royal Society ◽  
Scientific Community ◽  
Modern Literature ◽  
Scientific Instruments ◽  
Astronomical Observations ◽  
New Ideas ◽  
Made In

Elected in 1723, Isaac de Sequeira Samuda (1681–1729) was the first Jewish Fellow of the Royal Society. He had arrived in London just a few years earlier, escaping from the Portuguese Inquisition. Despite his past, he had no difficulty in establishing links with his country's diplomatic representatives in London. A physician and adviser on scientific subjects, he became a conduit between the emerging world of Portuguese astronomy and the British scientific community. He reported to the Royal Society on astronomical observations made in the new observatories in Lisbon and helped with the acquisition of scientific instruments and books destined for Portugal. These activities were facets of Samuda's unusual career and the diverse though often converging associations that he established until his death. As the member of a network active in the diffusion of new ideas and in the modernization of Portuguese science, Samuda can be regarded as an estrangeirado , as this term has come to be used in the modern literature.

scholarly journals VIII. Astronomical observations. In two letters from M. Francis de Zach, Professor of Mathematics, and Member of the Royal Academies of Sciences at Marseilles, Dijon, and Lyons, to Mr. Tiberius Cavallo, F. R. S

1785 ◽  
Vol 75 ◽  
pp. 137-152
Keyword(s):  
Royal Society ◽  
The Sun ◽  
The Moon ◽  
Vernal Equinox ◽  
Astronomical Observations ◽  
Pendulum Clock ◽  
Jupiter’S Satellites

Sir, I send you the account of the observations on the eclipse of the moon, which I have made together with the rev. Father Le Fevre, Astronomer at Lyons, in the Observatory called au grand Collège ; to which I shall add the observations of the vernal equinox; some observation son Jupiter's satellites, made at Marseilles by M. Saint Jacques de Sylvabelle; and, lastly, a new solution of a problem that occurs in computing the orbits of comets. If you think that these observations do in any way deserve the notice of the Royal Society, I ascertain the going of the pendulum clock, I took several corresponding altitudes of the sun, which you will find in the following table.On the day of the eclipse the sky was very serene, nothing could be finer, and it continued so during the observation.

A Royal Society appointment with Venus in 1769: the voyage of Cook and Banks in the Endeavour In 1768-1771 and its botanical results

1969 ◽  
Vol 24 (1) ◽  
pp. 64-90 ◽  
Keyword(s):  
Pacific Ocean ◽  
Royal Society ◽  
The Sun ◽  
Royal Navy ◽  
The Earth ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Set Up ◽  
George Iii ◽  
Made In

A little over two hundred years ago a number of serious and learned men in Copenhagen, London, Paris, St Petersbourg, Stockholm and elsewhere, men who were academicians, Fellows of the Royal Society, Lords of the Admiralty, politicians and the like, had been thinking seriously and learnedly about the behaviour of Venus, not, of course, about Venus as represented coldly and chastely by the marble statues being imported from Italy or more warmly in the paintings of Boucher and his contemporaries, but about her far distant planet which was calculated to pass across the disk of the Sun in 1769 and not to make another such transit until 1874. Observations of the 1769 transit at widely separated stations would provide, it was hoped, the means of calculating the distance of the Earth from the Sun. The Royal Society in London, having set up in November 1767 a sub-committee ‘to consider the places proper to observe the coming Transit of Venus’ and other particulars relevant to the same, presented a memorial to King George III outlining possible benefits to science and navigation from observations made in the Pacific Ocean and received in return the promise of £4000 and a suitable ship provided by the Royal Navy (8).

Sign in / Sign up

Export Citation Format

Share Document