0CT# — mar. 1858-59.] Report of the Magnetic Survey. 347 



Names of 

 Rivers. 



Names of the nearest 

 Places. 



February. 

 1856. 



Temperature 

 of the water 

 at 11 a. m. 



Temperature 

 of the air at 



9 A. M. 





Centigrade. 



Centigrade. 





O / 



o 



6 



1 



1 O U 



12 4 





1 ^ 7 



19 6 



9 



1 9 



AO 4 



10 



1 7 1 



16 2 



11 



17 2 



15 8 



13 



17 5 



14 6 



14 



17 8 



17 0 



15 



18 4 



19 3 



16 



19 4 



18 6 



17 



19 3 



18 7 



18 



19 6 



20 7 



19 



19 7 



22 1 



20 



21 2 



21 7 



21 



22 8 



22 8 



22 



21 6 



21 8 



23 



21 6 



21 4 



24 



22 0 



20 5 



25 



23 5 



23 4 



26 



23 8 



25 5 



27 



24 6 



26 1 



Brahmapootra . 



Zuboona. 



Kertinana.. 

 Bargunga. 

 Damudar . 

 Chare ollee. 

 Passur. . . . 

 Seprah . . . 



Terra Bank a. 



Moree Gunga. 



At Debrooghur 



Above Dikhoo Mookh. . 

 Above DhunsiriMook. . 



Tezpore 



At the mouth of the 



Kulluny 



Gowahatty 



Above Doobree. . . 

 Below Doobree. . . . 



Bugwa 



Hajeepore 



Seraj gunge 



Amerbad 



Senpore 



Kalaghaut 



Burrissole 



Bidaboorea 



Koolna 



Near Grant No. 



Sunderbunds. . . , 

 Near Grant No. 



Sunderbunds .... 

 East of Saugor Island... 



The variation of the temperature of the air is 26° V, 12° 6', 

 13° 2', C, of the water 24° 6', 15° 6', 9* C. 



In the Dhunsiri and in the Riju, the difference between the 

 temperature of the Dhunsiri near Orang in the valley of Assam 

 and of the Riju, a lateral affluence of the Dhunsiri at Nurigoon, 

 was Dhunsiri, 18° 1 ; 



Riju, - 9° 0' 9° V C. 



During my journey from Calcutta to Umballa, I tried, besides, 

 several times, some experiments to measure the heating power of 

 the sun's rays under various conditions. 



I used for a complete observation the following thermometers : 



2* J Dry and wet bulb for temperature and moisture of the air. 



