1846. 



VELOCITIES OF GLACIER OPPOSITE MONTANVEIIT. 



189 



a series of transverse stations nearly opposite to the Montan- 

 vert, and marked with the numbers D 2, D 5, D 6, D 3, since 

 the commencement of my observations.* The first in order 

 was about 100 yards from the western shore, D 5, was 130 

 yards farther, D 6 was 75 yards farther, and on the axis of 

 the " dirt-bands ; " D 3 was 60 yards farther, near the medial 

 moraine, and about 350 yards from the eastern side of the 

 glacier. 



MEAN DAILY MOTIONS. 



RELATIVE DAILY MOTIONS, D 2 BEING = 1. 



It will be seen that both the absolute and relative motions 

 were markedly greater in 1846 than in the previous years ; 

 and that this also agrees with the annual motions at station C 

 given above. 



A block, on the ice opposite Les Fonts (between Montan- 

 vert and the Angle), marked with the letter P on the 18th 

 September 1843, moved 486 feet from that date to 9th 

 August 1844 (or 331 days), being 17*62 inches daily, or 536 

 feet annually. The same block, re-examined on the 16th July 

 1846, had moved 776 feet since the 9th August 1844, or only 



* Travels, 2d Edition, pp. 137-140. 



f From 25th July to 3d August only. 



J [These numbers were incorrectly calculated in this letter as originally printed.] 



