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



We made great use of them in the parts of the Himalayas North 

 of the Snowy Kange and in Thibet, and we endeavoured, by taking 

 a series of angles from several elevated stations, to furnish materials 

 for ascertaining the position and height of the ranges between the 

 Sutlej and North of the Indus ; the principal stations were near 

 Milum and on the Milum Glaciers, the Sutlej near Gyungal, the 

 Indus near Gurtok, Gunshankoerr (19,640 E. F.), on the Ibi Gamin 

 Glacier (19,220 E. F.), on the Mana Pass (18,365 E. F.), Chako 

 La (17,350 E. F.), and Phoko La (18,700 E. F.), the belong Pass 

 18,110 E. F.), &c. 



We hope that our observations, combined with the excellent 

 researches formerly made at other points by Captains Henry and 

 Richard Strachey, may serve to give a pretty correct general view 

 of the interesting geography of the large basin of the Sutlej. 



11th. Our topographical maps refer more especially to the dif- 

 ferent glacier systems in the central groups of the Himalayas, several 

 of these maps will be found in the book of drawings, &c, which we 

 have the honor to submit to Government for inspection, together 

 with this Report. 



We think it essential to state that these maps, as they are at 

 present, being mere topographical sketches made during the journey 

 and on the ground, have, comparatively speaking, only small parts 

 of our bearings and angles protracted upon them. They will all 

 require revision and correction, after the final computations of our 

 angles ; we hope therefore, that these maps may not be used for 

 publication, till we have had the opportunity of making all the 

 necessary revisions as accurate as possible. 



We must content ourselves with enumerating in a few paragraphs 

 some of the results to which we think the geological investigation 

 of this part of the Himalayas must lead us. 



12th. The extent of the real crystalline rocks, as granite, gneiss, 

 and true mica schists, is, comparatively speaking, much smaller in the 

 Himalayas than has been sometimes assumed. They are strictly 

 limited to the high central groups of this mountain system. 



These groups seem to form, from a distance, one continuous line 

 of high peaks, covered with snow, generally known under the name 

 of the Snowy Range; but in reality, it is by no means a continuous 



