Sabler Georg Thomas [Sabler Yehor (George) Yehorovich] General data:
30.04.1810 - 04.12.1865
Place of birth: Haljala city, Ljaene-Virumaa county, Haljala parish, Estonia province, Russian Empire
Studied in: Dorpat University, Livonian province, Russian Empire (since 1919 Tartu University, Estonian SSR and since 1991 the Republic of Estonia) (1828-1939);
Key interests: physics, mathematisc, astronomy, theology, geodesy. ScD Thesis: Observation about the earthly refraction and about the laws of changing the same (1939 Dorpat University);
Biography:
He was born on April 30, 1810 in the Haljala city of Läene-Virumaa County of Haljala Parish of Estonia Province of Russian Empire (now the Republic of Estonia) in the family of a Lutheran pastor.
At first he studied privately, later he graduated from the gymnasium at the Tartu Evangelical Cathedral.
In 1836, together with A. N. Savich and E. N. Fuss, he participated in an expedition organized by the Imperial Academy of Sciences to determine the height difference between the levels of the Black and Caspian seas.
In 1839, he received the degree of Doctor of Philosophy at the Professorial Institute at the University of Derpt, where he initially entered the theological faculty in 1828, and studied mathematics in 1832-1839. In 1933, V. Ya. Struve, even before completing the course in astronomy, received a position as a junior assistant at the Derpt observatory (later, assistant director). The title of the dissertation is "Observations on Earth's refraction and the laws of its change" ("Beobachtung über die irdische Stralenbrechung und über die Gesetze der Veränderung derselben").
At the opening of the Pulkovo Observatory in 1939, he became one of its astronomers at the suggestion of Struve. Here he not only studied the location of many stars that served at different times for comparison with the positions of comets observed in Pulkovo, but also participated in compiling a large description of the stars, which eventually contained all the stars observed by Bradley in the middle of the 18th century , therefore presents interesting materials for the study of the own motion of the stars.
In 1843, he took part in a chronometric expedition to determine the difference in the longitudes of the Pulkovo and Alton observatories.
in 1844-1853, together with K. Tenner, he participated in the construction of the so-called Struve Arc and, in particular, its "Romankoutsky base" on the territory of the Romankovets parish of the Khotynsky District. For measurements, the scientists chose the prevailing heights of the area, which were located near the Romankivtsi, Shebutyntsi, Selishche and Hrubno villages. In 1848, H. Zabler lived in Romankivtsi for more than a week. The results of research, including those conducted in Romankivtsi, as well as in Gvizdivtsi and Selyshchi, were published in scientific publications of that time, for example, in the "Bulletin of the Imperial Russian Geographical Society" (1853) and the "Journal of the Ministry of National Education" and some other editions. Also determined the lengths of bases (main lines in triangle networks) in Finland.
In 1854, he was appointed director of the Vilnius Observatory, which at his request received a photoheliograph from England.
Presuming to engage in photographic images of the sun to determine the position of the spots, E. E. Sabler went to England, where he worked under the guidance of Delarue. While in London City, in 1862, he agreed with the famous optician John Henry Dallmeyer to manufacture a device for recording sunspots.
He rose to the rank of valid state adviser.
He died on December 4, 1865 (according to other data, in 1964 or July 1, 1865) in Vilno city of Russian Empire.
Known as a scientist, astronomer and surveyor, who was the first to find a way to determine the angle of refraction in transparent media, he managed to make achromatic lenses using two glasses of kronglas, between which lay a transparent liquid with the appropriate refractive and light scattering coefficients, participated in the assembly of a large description of the stars.
Sources:
1 Ñâÿòîñëàâ Ðÿáèé, Ñåðã³é ßêóáèíà ØÅÁÓÒÈÍÖ² ÍÀ ØËßÕÓ ÄÓÃÈ ÑÒÐÓÂÅ.//Àðõåîëîã³ÿ Áóêîâèíè: çäîáóòêè òà ïåðñïåêòèâè: Òåçè äîïîâ³äåé ²V ì³æíàðîäíîãî íàóêîâîãî ñåì³íàðó (ì. ×åðí³âö³, 11 ãðóäíÿ 2020 ð.). – ×åðí³âö³: Òåõíîäðóê, 2020. – 238 ñ.-Ñ.170
2 wikipedia.org
3 et.wikipedia.org
4 lt.wikipedia.org
