scholarly journals III. Total eclipse of the sun observed at Caroline Island, on 6th May, 1883

1889 ◽  
Vol 180 ◽  
pp. 119-135 ◽  
Keyword(s):  
Royal Society ◽  
Solar Physics ◽  
The Sun ◽  
The Moon ◽  
Solar Image ◽  
Total Eclipse ◽  
Previous Communication

Owing to the representations of the Committee on Solar Physics, who communicated with the Royal Society the desirability of observing this eclipse, an expedition was organised under the auspices of the latter body. The Council of the Royal Society having requested me to draw up a report on the Total Eclipse observed at Caroline Island, I undertook the task so far as relates to the results which were obtained with the same instruments which were employed in the observations of the Total Eclipse in Egypt in 1882. Two observers, Mr. H. Lawrance and Mr. C. R. Woods, who had both taken part in the Eclipse Expedition to Egypt as assistants to Professors Lockyer and Schuster, were entrusted with the arduous duty of making the observations. The expedition was devoted entirely to photographic work, the main object being to continue the photographic observations which had been carried on in Egypt, consisting of photographs of the corona taken on very rapid plates with varying exposure, photographs of the corona taken with a slitless spectroscope (the prismatic camera), and a photograph of the corona spectrum, the image of the moon and the corona being thrown on the slit cutting the diameter of the former. There is no occasion to describe the instruments which were employed for the first two classes of observations, as they have been fully described in the previous communication to the Royal Society by Professor Schuster and myself which appears in the ‘Philosophical Transactions’ for 1884. The photographic spectroscope which was employed on this occasion differed in one detail, and in one detail only, in that the dispersion was doubled, two medium dense flint prisms of 62½° being employed instead of one prism of the same angle. The experience gained in Egypt seemed to show that, if the coronal light was equally bright in the two eclipses, the rapid plates used on both occasions would be amply adequate to secure photographs with the larger dispersion. Besides these observations several others were made, but did not meet with the success it was hoped they would have done. A photoheliograph, giving a 4-inch solar image, was attached to an equatorial mount, in addition to the wooden camera carrying a lens of 5 ft. 6 in. focus, with which the smaller-sized pictures of the corona were taken in Egypt. The pictures taken with the former though sufficiently exposed, showed that a large image could be utilised.

I. Further discussion of the sun-spot observations made at South Kensington. A report to the solar physics committee. Communicated to the Royal Society at the request of the committee

1890 ◽  
Vol 46 (280-285) ◽  
pp. 384-401
Keyword(s):  
Royal Society ◽  
Solar Physics ◽  
The Sun ◽  
Iron Nickel

I have previously reported the results of 700 observations of Sunspot spectra, extending from November, 1879, to August, 1885. The observations have been carried on continuously since the latter date, but, in consequence of the small number of spots which have been visible, the number of additional observations is only a little over 150. Last year very few observations could be made. The eighth hundred of observations dates from August, 1885, to August, 1887, and the first half of the ninth hundred from August, 1887, to February, 1888. As on former occasions, I give Tables A, B, C, showing the numbers of lines of iron, nickel, and titanium respectively which have been recorded amongst the most widened. Table D shows the results in the case of the lines which may at present be described as “ unknown lines.”

scholarly journals The total eclipse of the sun, April 16, 1893. Report and discussion of the observations relating to solar physics

1897 ◽  
Vol 60 (359-367) ◽  
pp. 17-19
Keyword(s):  
West Africa ◽  
Solar Physics ◽  
The Sun ◽  
Total Eclipse

The memoir first gives reports by Mr. Fowler and Mr. Shackleton as to the circumstances under which photographs of the spectra of the eclipsed sun were taken with prismatic cameras in West Africa and Brazil respectively on April 16, 1893.

scholarly journals VIII. Total eclipse of the sun, May 28, 1900. Account of the observations made by the solar physics observatory eclipse expedition and the officers and men of H. M. S. “Theseus” at Santa Pola, Spain

1902 ◽  
Vol 198 (300-311) ◽  
pp. 375-415
Keyword(s):  
Solar Physics ◽  
The Sun ◽  
Total Eclipse

The discussion of the series of photographs taken with the prismatic cameras employed in the last three eclipses indicated that continued work with this form of spectroscope should be undertaken, with the view (1) of obtaining data strictly comparable with the previous photographs, and (2) of extending the inquiry into the comparative lengths of the various arcs. For the first purpose it seemed desirable to repeat the Indian work with the 6-inch camera having two prisms; while for the second an instrument of longer focus was necessary.

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.

scholarly journals I. Researches on the spectra of meteorites. A report to the Solar Physics Committee. Communicated to the Royal Society at the request of the committee

1888 ◽  
Vol 43 (258-265) ◽  
pp. 117-156 ◽  
Keyword(s):  
Royal Society ◽  
Solar Physics ◽  
Solar Spectrum ◽  
The Sun ◽  
Metallic Elements ◽  
Chemical Constitution

Some years ago I commenced a research on the spectra of carbon in connexion with certain lines I had detected in my early photographs of the solar spectrum. I have been going on with this work at intervals ever since, and certain conclusions to which it leads, emphasising the vast difference between the chemical constitution of the sun and of some stars, recently suggested the desirability of obtaining observations of the spectra of meteorites and of the metallic elements at as low a temperature as possible. I have latterly, therefore, been engaged on the last-named inquiries. The work already done, read in conjunction with that on carbon, seems to afford evidence which amounts to demonstration on several important points.

Removing the Stripe Noises Interference on the Hα Full-Disk Solar Image Based on Multiscale Transform

2014 ◽  
Vol 596 ◽  
pp. 365-369 ◽  
Author(s):  
Shuan He ◽  
Sheng Zheng ◽  
Yao Huang
Keyword(s):  
Solar Physics ◽  
The Sun ◽  
Solar Image ◽  
Two Dimension ◽  
Noise Interference ◽  
Signal Conversion ◽  
Observation Process ◽  
Multiscale Transform ◽  
Full Disk

Hα full-disk observation is an important observation of the sun. It has an important significance to the solar physics research. But its observation process may be affected by the system, resulting the observed images contain stripe noises. This paper describes a method to remove the particularity of stripe noises contained in the Hα full-disk solar image. This method includes the following four steps: First, decomposing the sun image into multiple detail scales by the multiscale transform; Second, doing special two-dimension signal conversion on the detail scales mainly containing the noises signal; Third, doing the adaptive Gaussian filtering on the two-dimension signal and restoring the processed signal to the image; Finaly, using the multiscale inverse transform to obtain the final restoration image. Experiments show that this method can effectively remove this type of noise interference from the solar image and improve the quality of the solar image.

scholarly journals Total eclipse of the Sun, May 28, 1900.—Account of the observations made by the Solar Physics Observatory Eclipse expedition and the officers and men of H. M. S. 'Theseus' at Santa Pola, Spain

1901 ◽  
Vol 68 (442-450) ◽  
pp. 404-405
Keyword(s):  
Preliminary Report ◽  
Solar Physics ◽  
The Sun ◽  
Total Eclipse

The Report gives details as to the erection of coronagraphs, prismatic cameras, and other instruments, and of the results obtained by their use during the eclipse, which was observed under very favourable circumstances. Some of the more obvious results have already been stated in a Preliminary Report, and the following remarks may now be added. A comparison of the photographs taken with the coronagraph of 16 feet focus with those taken about two hours earlier in America indicates that while some of the prominences changed greatly in appearance in the interval, no changes were detected in the details of the corona.

Obituary notices of fellows deceased

1874 ◽  
Vol 22 (148-155) ◽  
Keyword(s):  
Spectrum Analysis ◽  
Royal Society ◽  
Solar Physics ◽  
The Sun ◽  
Intellectual Activity ◽  
The World ◽  
Paternal Grandfather ◽  
Long Life ◽  
Geological Science ◽  
The University

Archibald Smith, only son of James Smith, of Jordanhill, Renfrewshire, was born on the 10th of August, 1813, at Greenhead, Glasgow, in the house where his mother’s father lived. His father, who also was a Fellow of the Royal Society, had literary and scientific tastes with a strongly practical turn, fostered no doubt by his education in the University of Glasgow and his family connexion with some of the chief founders of the great commercial community which has grown up by its side. In published works on various subjects he left enduring monuments of a long life of actively employed leisure. His discovery of different species of Arctic shells, in the course of several years dredging from his yacht, and his inference of a previously existing colder climate in the part of the world now occupied by the British Islands, constituted a remarkable and important advancement of Geological Science. In his 'Voyage and Shipwreck of St. Paul,’ a masterly application of the principles of practical seamanship renders St. Luke’s narrative more thoroughly intelligible to us now than it can have been to contemporary readers not aided by nautical knowledge. Later he published a ‘Dissertation on the Origin and Connexion of the Gospels;’ and he was engaged in the collection of further materials for the elucidation of the same subject up to the time of his death, at the age of eighty-five. Archibald Smith’s mother was also of a family distinguished for intellectual activity. Her paternal grandfather was Dr. Andrew Wilson, Professor of Astronomy in the University of Glasgow, whose speculations on the constitution of the sun are now generally accepted, especially since the discovery of spectrum-analysis and its application to solar physics. Her uncle, Dr. Patrick Wilson, who succeeded to his father’s Chair in the University, was author of papers in the ‘Philosophical Transactions’ on Meteorology and on Aberration.

scholarly journals III. Observations of the late total eclipse of the sun on the 22d of April last past, made before the Royal Society at their house in Crane Court in Fleet-street, London. By Dr. Edmund Halley, Reg. Soc. Secr. With an account of what has been communicated from aboard concerning the same

1714 ◽  
Vol 29 (343) ◽  
pp. 245-262 ◽  
Keyword(s):  
Royal Society ◽  
The Sun ◽  
Total Eclipse

Though it be certain from the principles of astronomy, that there happens necessarily a central eclipse of the sun in some part or other of the terraqueous globe, about twenty eight times in each period of eighteen years;

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