joseph nicolas de lisle, in our opinion, osip nikolaevich, lomanosov’s teacher, spent the most fruitful, he... led the observatory in the kunskamera building, carried out meteorological observations, compiled a detailed map of the empire, and in 1740 went on an expedition to siberia, however, when it turned out that he was secretly sending copies of maps of russian territory to france, he was expelled from the country; the brothers daniel and nikolai bernoulli headed the department of physiology and mathematics at the academy. after the lecture, daniil practiced medicine and visited himself. took them at home, restored limbs that seemed to be subject to amputation, treated stomach and heart diseases, and colds. at his invitation, another future great scientist, leonhard euler, arrived in russia. swiss mathematician, mechanic and physicist, for throughout his life he wrote about 850 scientific works, most of them in russia. at the st. petersburg academy of sciences he was a professor of physics and headed the department. developed methods for raising the large bell in the moscow kremlin.