Vitra Fyodor

(b. 1854). He graduated from the course at the University of Dorpat. Consists senior astronomer at Pulkovo Observatory and professor of practical astronomy geodesic Branch of the Academy of General Staff. Theses Vitrama master's degree and doctor of astronomy to the issue of perturbations of planets, comets. In 1901, Mr.. Vitra, the results of the Russian expeditions to observe transits of Venus 1874. In editions of the Pulkovo Observatory and the Military Topographical Department published works Vitrama, . concerning production nivelirovok, . determine the difference of longitude Pulkovo - Arkhangelsk, . Pulkovo - Potsdam, . and supporting schedules to determine the time and latitude, etc.,