METEOEOLOGY IN EUSSIA. 295 



town. Baku is situated in a low, arid country north of this place. 

 The vicinity of Kuba and Derbent has much more rains, because the 

 ramifications of the high Sbah-Dagh approach the Caspian. This country 

 has magnificent forests and very favorable conditions for agriculture. 



I have already said that the opening and freezing of rivers was long- 

 ago observed in liussia. These data give us tbe means of ascertaining 

 something of climates where no thermometrical observations have been 

 made. 



In the following table the rivers are arranged according to natural 

 basins. The principal rivers are taken from then' source to their mouth, 

 and their affluents afterwards. 



Numher of days the rivers were frozen. 



BASIN OF THE PACIFIC. 



Amoor at Nicolajovsk 193 



Onou iiear Nertcbiusk 170 



BASIN OF THE ARCTIC. 



Yana at Ustyansk, 70° N 260 



Leua ut Kirensk, 57° 204 



Lena at Yakoutsk, 62° 204 



Yenisei at Yeuisseisk, 58° 171 



Angara at Irkoutsk, 52° 87 



Obi at Barnaul, 53° 167 



Irtisb at Tobolsk, 58° 173 



Tom at Tomsk, 56° 1^:0 



Tobol at Kurgan 171 



Sosva at Beresov, 64° 207 



Isset at Catberiueburg 179 



Petcbora at its moutb, about 240 



]) wina at Arcbangel, 05° 191 



Sucboua at Ustjug 163 



Wy tscbegda at Jarensk 132 



Wologda at Wologda, 59° 170 



Onega, 64° 169 



Tana at Utsjoki, 69° 197 



BASIN OF THE BALTIC. 



Kemi near Toneo, 66° 207 



Euontekois, 68° 223 



Uleo at Uleaborg, 65° 201 



Neva at St. Petersburg, 60° 147 



Narova at Narva, 59° 137 



Embacb at Dorpat, 58° ]31 



Dwina at Witebsk, 56° 134 



Dwiua at Riga, 57° 126 



Niemen at Ko vno, 54° 90 



Vistula at Warsaw, 52° 85 



BASIN OF THE BLACK AND AZOV SEAS. 



Danube at Galatz, 45° 48 



Dneper at Kiev, 50° 97 



