250 



Sierra Club Bulletin. 



path leading from Yungay by way of Quillo to the sea at the 

 port of Casma. 



The Garganta Signal is higher than the col where the path 

 between Yungay and Casma reaches its highest point. The 

 difference in height between these two was ascertained by tri- 

 angulation from the Garganta Signal to be 159 metres (521.5 

 feet). From the col down to sea-level at the port of Casma the 

 leveling was performed by means of the tacheometer. The 

 altitude of the Garganta Signal being thus established, it was 

 an easy matter to fix the altitude of the other three stations, 

 from which the triangulation of the summits was made. 



From two of these stations from which it was visible, the 

 altitude of the church tower at Yungay was also established at 

 2,568 metres (8,432 feet). 



The average sea-level was determined by four double observa- 

 tions of two water-marks made at intervals of six hours, ten 

 minutes between each. The agreement of these was satisfactory 

 owing to the small amplitude of the tide at Casma, and also to 

 the fortunate circumstance, that the observations were made at 

 time of neap tide. 



The results of these measurements show the height of the 

 north peak of Huascaran to be 6,650 metres (21,812 feet), and 

 the height of the south peak 6,763 metres (22,182 feet). 



Fanny Bullock Workman. 



February 15, 1910. 



Dr. Longstaff's Expedition to the Karakoram. 



Dr. Longstaff has now returned from his expedition to the 

 unexplored regions of the Karakoram, north of Kashmir. The 

 Karakoram range has always been shown upon maps as a great, 

 unbroken wall stretching eastwards from the peak of K^ (28,250 

 feet), and forming the water-parting between the Indian and 

 the Central Asian systems of drainage. For a hundred miles east 

 of K^ there is no pass over this range known to the natives, and 

 when Dr. Longstaff set out to explore the region last spring his 

 aim was to cross the Karakoram range by a pass named the 

 Saltoro, the existence of which was based upon tradition only, 

 and the position of which was doubtful. 



In June last Dr. Longstaff discovered the old Saltoro pass 

 (18,200 feet), and crossed the Karakoram range with Dr. Neve 

 and Mr. Slingsby. On the further side of the range the party 

 came upon an immense glacier, which they judged from the maps 

 to be flowing northwards and to belong to the drainage system 

 of Central Asia. On exploring the glacier, however, Dr. Long- 

 staff was astonished to find that it was flowing to the south, and 



