108 Report of the Magnetic Survey of India. [No. 2. 



After encamping on the 18th of August on the highest Moraine 

 of the Ibi Gamin glacier, at an elevation of 19,220 E. E. we sue* 

 ceeded, on the 19th of August, in ascending on the Northern flanks 

 of Ibi Gamin, covered with deep snow, to a height of more than 

 22,200 E. E. (22,260 E. E.) calculated from Agra. 



The very difficult ground, and a strong North wind, made it 

 impossible to advance any higher on the flanks of the Ibi Gamin, whose 

 summit is about 25,500 E. E., according to Captain R. Strachey. 



"We had an opportunity, during this ascent, of making several 

 observations on the temperature, the hygrometric conditions, and 

 the transparency and blueness of the atmosphere, and of examining 

 on a large scale the Geological and Orographical structure of the 

 great group of the Ibi Gamin Mountains. We may be permitted 

 to remark, that, a3 far as we know, it is the grestest height in any 

 Mountain system at which, till now, any observations of a similar 

 kind have been made. 



Encamping the next three days on different parts of the Ibi 

 Gamin glaciers, between 17,800 to 19,000 E. E., we crossed, on the 

 22nd of August, a high glacier pass, leading from the Western 

 branch of the Ibi Gamin glaciers, along the Sursutti glacier, down 

 to the valley above Mana and Badrinath. 



This pass (20,430 E. E.) is certainly one of the highest in the 

 Himalayas ; it has only once been crossed, by people from Mana, 

 some '60 or 40 years ago. 



We arrived at the village of Mana, above Badrinath, on the 24th 

 of August. Erom Mana, we took two different routes, one of us, 

 (Adolphe,) left on the 2nd September and went again into Thibet by 

 the Mana Pass (18,365 E. E. high) for the special purpose of com? 

 pleting the Geological investigations on the composition of the 

 sedimentary fossiliferous strata on the North side of the Himalayas, 



He succeeded in crossing the Sutlej a second time near Toling, 

 and, accompanied by a few mounted men, reached on the 9th of 

 September, without being in any way molested, the high pass of 

 Phoko La (18,700 E. E. high) lying in the ridge which separates 

 the Sutlej from the Indus, North- West of our former station, 

 Chako La. 



He took a series of angles from this place, and went back tq 

 Toling, Tsaprang, and from thence to the village of Puling. 



