Keywords: Гелиостата небесная сфера.jpg небесная сфе а celestial sphere painter from Brockhaus and Efron Encyclopedic Dictionary between 1890 1907 painter from Brockhaus and Efron Encyclopedic Dictionary PD-Brockhaus Efron PD-RusEmpire Images from Brockhaus and Efron Encyclopedic Dictionary Heliostats |