Device for determining the directions and angular velocities of cloud movements

Pomortsev, M.M.A device for determining the directions and angular velocities of cloud movements.- St. Petersburg: Type.Ch.Ex.Dolov, 1896. -24 p., 7 l.Table., Ill., Damn.: table .. -Ex.: With gifts.The inscription to Julia Mikhailovich Shokalsky from the author..I. Shokalsky, Julius Mikhailovich.1.Territory (collection).Electronic copy source: PBOriginal storage: RGO