scholarly journals III. On a periodic change of the elements of the force of terrestrial magnetism discovered by Professor Hornstein

1872 ◽  
Vol 20 (130-138) ◽  
pp. 21-21
Keyword(s):  
Periodic Change ◽  
The Sun ◽  
Horizontal Force ◽  
Terrestrial Magnetism ◽  
Imperial Academy ◽  
Academy Of Sciences

Professor Hornstein, of Prague, has communicated to the Imperial Academy of Sciences of Vienna a paper entitled “On the dependence of the Earth’s Magnetism on the Rotation of the Sun.” He shows that the changes of each of the three elements of the force of terrestrial magnetism (declination, inclination, and horizontal force) indicate a period of 26 1/3 days. The periodic change of declination for Prague (1870) amounts to 0.705 sin ( x + 190° 20'), where x = 0° at the commencement of 1870, and x = 360° at the commencement of 1871. For Vienna the range is a little larger. The range of inclination is nearly one-third of that of declination, that of the intensity nearly 24 units of the 4th decimal (the intensity in June 1870 was nearly 2.0485).

scholarly journals II. On a supposed periodicity in the elements of terrestrial mag­netism, with a period of 26 1/3 days

1872 ◽  
Vol 20 (130-138) ◽  
pp. 308-312 ◽  
Keyword(s):  
The Sun ◽  
Horizontal Force ◽  
Magnetic Elements ◽  
Royal Observatory ◽  
Imperial Academy ◽  
Meteorological Observations ◽  
Academy Of Sciences ◽  
Periodical Change

In a paper published in the ‘Proceedings of the Imperial Academy of Sciences of Vienna,’ vol. lxiv., Dr. Karl Hornstein has exhibited the results of a series of observations which appeared to show that the earths magnetism undergoes a periodical change in successive periods of 26 1/3 days, which might with great plausibility be referred to the rotation of the sun. It appeared to me that the deductions from the magnetic observations made at the Royal Observatory of Greenwich, and which are printed annually in the Greenwich Observations,’ or in the detached copies of ‘Results of Magnetical and Meteorological Observations made at the Royal Observatory of Greenwich, would afford good materials for testing the accuracy of this law, as applicable to a series of years. The mew results of the measured hourly ordinates of the terrestrial magnetic elements are given for every day, and it is certain that there has been no change of adjustments of the declination and horizontal-force instruments in the course of each year. For the horizontal-force instrument the temperature of the room has been maintained in a generally equable state, and in later years it has been remarkably uniform.

scholarly journals XXIII. On the nature of the sun’s magnetic action upon the earth

1863 ◽  
Vol 153 ◽  
pp. 503-516
Keyword(s):  
Early Stage ◽  
Diurnal Variations ◽  
Vertical Force ◽  
The Sun ◽  
Horizontal Force ◽  
Terrestrial Magnetism ◽  
Magnetic Effects ◽  
The Earth ◽  
Magnetic Action

1. In attempting to frame a theory which shall account for the relations which have been shown to exist between the variations of terrestrial magnetism and the position of the sun with respect to the place of observation on the earth’s surface, the following question presents itself for consideration at an early stage of the inquiry, “Are the magnetic effects produced on the earth such as could be explained by the simple supposition that the sun is a great magnet, or not ?” The solution of this question will, to a certain extent, limit the range of probable sources from which to seek the true cause of mag­netic variations, and is therefore worthy of attention. 2. In the first place, let us endeavour to find the law of the diurnal variations of the Declination, Horizontal Force, and Vertical Force at a given place on the earth’s surface, on the supposition that these variations arise from the varying relations, as to position, of the sun acting as a magnet upon the earth.

The role of science in the study of and response to space threats

2019 ◽  
Vol 89 (8) ◽  
pp. 777-799
Author(s):  
B. M. Shustov
Keyword(s):  
Comparative Analysis ◽  
20Th Century ◽  
21St Century ◽  
Space Debris ◽  
The Sun ◽  
National Program ◽  
Biological Hazard ◽  
Academy Of Sciences ◽  
Space Activities

During the second half of the 20th century and the beginning of the 21st century, space hazards multiplied, the most urgent of which is space debris. Professionals working in space are exposed to this hazard daily and are aware of it as a problem. Furthermore, increasing attention is being paid to the unpredictable behavior of the Sun, which produces the so-called space weather. The asteroid-comet hazard is considered as potentially having the most catastrophic consequences. No manifestations of biological hazard have yet been observed, although as space activities develop, it is becoming increasingly important. The appropriate time scale for astrophysical hazards is many millions of years, so from a practical perspective, they have no importance. This article briefly describes the main types of space hazards. The author analyzes the results of research and practical work in the field, both worldwide and specifically in Russia. Comparative analysis leads to the clear conclusion that a national program must be developed for the study of space hazards and to respond to space threats. This article is based on a report made by the author at the meeting of the Presidium of the Russian Academy of Sciences (RAS) on January 15, 2019.

scholarly journals The astronomer - N. N. Donitch

2003 ◽  
pp. 71-77
Author(s):  
A.A. Baikov ◽  
A. Gaina
Keyword(s):  
English Translation ◽  
Main Part ◽  
History Of ◽  
Imperial Academy ◽  
Solar Eclipses ◽  
Academy Of Sciences

This paper describes a history of friendship and collaboration between the astronomers N. Donitch and A.A. Baikov. Information on other astronomers L.V. Okulitch and E.A. Von der Pahlen, and meteorologists V.H. Dubinskii and Nina Gouma, can also be found. Details on the expeditions aimed at observing the total solar eclipses on 30 August 1905 (organized by the Imperial Academy of Sciences in Sankt-Petersburg) and 19 June 1936 (organized by the Romanian Royal Cultural foundation) are given. The main part represents the first English translation of the paper by Baikov, published earlier in Russian and Romanian, with a new preface, annotations, and comments.

scholarly journals Listy Władysława Taczanowskiego do Aleksandra Straucha w zbiorach Rosyjskiej Akademii Nauk – interesujący przyczynek historii zoologii w XIX wieku

2021 ◽  
pp. 161-186
Author(s):  
Piotr Daszkiewicz ◽  
Dominika Mierzwa-Szymkowiak
Keyword(s):  
Nineteenth Century ◽  
Zoological Museum ◽  
Main Theme ◽  
Russian Academy Of Sciences ◽  
Interesting Contribution ◽  
History Of ◽  
History Of Zoology ◽  
Imperial Academy ◽  
The Russian Empire ◽  
Academy Of Sciences

Letters from Władysław Taczanowski to Alexander Strauch in the Russian Academy of Sciences Collections. An Interesting Contribution to the History of Zoology in the Nineteenth Century The article presents the Polish translation and analysis of the letters from Władysław Taczanowski (1819–1890) to Aleksander Strauch (1832–1893). The correspondence is stored in the Archive of the Russian Academy of Sciences in St. Petersburg and comprises 29 letters written between 1870 and 1889. The main theme of these letters is specimens of reptiles and amphibians sent to Warsaw by Polish naturalists, such as Benedykt Dybowski from Siberia, Konstanty Jelski from French Guiana and Peru, Jan Kalinowski from Korea, as well as specimens brought by Taczanowski from Algeria. Strauch determined the species and used them in his publications. This correspondence is also a valuable testimony of the exchange of specimens between the Warsaw Zoological Cabinet and the Zoological Museum of the Imperial Academy of Sciences in St. Petersburg. In return for herpetological specimens, the Warsaw collection received numerous fish specimens from the Russian Empire and a collection of birds from Mikołaj Przewalski’s expedition to Central Asia. The content of the letters allows a better understanding of the functioning of natural history museography but also the organization of shipments, preparation, determination, and exchange of specimens. They are a valuable document of the history of nineteenth-century scientific museography.

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