54 H. F. Reid — Sivdies of Muir Glacier. 



the inlet and ice-front was made from Camp, Z), L and M. 

 Photographs were made from many points, and these have been 

 of the greatest use in drawing in the general topography. As to 

 the accuracy of the maps I think that none of the points marked 

 thus O are out of their place by 1% of their distance from E ; 

 many are much more accurately fixed. Many points where the 

 rocks and ice were in contact, etc, were, of course, determined, 

 but with much less accuracy. 



In order to connect our map with any future survey that may 

 Ije made in this region, we made two cairns of heavy stones, one 

 at D and one at E. D is on the gravels on the eastern side of 

 the inlet, at a height of 107 feet above mean tide. E is on a flat 

 knoll of the ridge descending from mount Wright, at an eleva- 

 tion of 890 feet. The horizontal distance between D and E is 

 2,735 yards, and the line connecting them runs N. 41° 43' E., 

 astronomical. 



The latitude of our camp was determined on several occasions ; 

 the average, 58° 49'.7, can hardly be in error by more than a 

 half minute. The longitude was not determined ; on first going 

 into camp the chronometer was allowed to run down, and when 

 we left, it stopped for some reason unknown. The chronometers 

 of the steamers were not sufficiently accordant among themselves 

 to give reliable results by comparison with our local time. The 

 longitude adopted by reference to the best map of the region in 

 the Coast Survey office is 136° 5' W., which can hardly.be in 

 error by 5'. 



On platting our map into the general chart of the United States 

 Coast and Geodetic Survey, we see that the area we surveyed 

 "occupies much of the region between Lynn canal, Chilcat river, 

 and the upper part of Glacier bay. The mountains on the east- 

 ern part of our map must be visible from Lynn canal, which is 

 only ten or twelve miles distant. Davidson glacier must have 

 tributaries in the mountains which close in Granite canyon. 

 There is a rumor that the Chilcat Indians were accustomed to 

 make the passage to Glacier bay over the Davidson and Muir 

 glaciers. If this is true there is probably a low divide between 

 some tributary of Davidson and the first northern tributary of 

 Muir. This region, unfortunately, we were unable to see. 



The scale of the general map is ysoVto"; which is large enough 

 to shoAV the detail we were able to make out, except in the neigh- 

 borhood of the mouth of the glacier. I have added contour lines 



