430 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Ill taking the mean of the elevations of La Plata Mountain, a double 

 weight has been given to the result from the barometrical observation 

 taken on this mountain, as it does not depend on vertical angles. 



The small range of results on La Plata Mountain (only 18 feet) demon- 

 strates the excellence of the Mount Lincoln base, and the importance of 

 having the base as nearly as possible at the same elevation as the points 

 measured. 



From these points as bases the following heights have been measured, 

 each result being the mean of a number of vertical angles taken with 

 weights inversely proportional to the distances : 



Elevation. 

 Feet. 



Massive Mountain (highest summit) 14, 298 



Mount Elbert (northern and highest summit) 14, 351 



Mount Yale 14,187 



Station 75 13,294 



Elk Mountains. 





Relative ele- 

 vation. 



Elevation of 

 barometer. 



Elevation of 

 Snowmass 

 Mountain. 



Mean eleva- 

 tion. 





Feet. 







+ 145 

 —1,918 



—613 

 i —620 



Feet. 

 13, 961 

 14, 1U6 

 12,014 

 13, 423 

 13,284 



Feet. 

 13, 961 

 13, 961 



13, 932 



14, 036 

 13, 904 



Feet. 

 13, 970 





14,115 





12, 052 





13, 357 





13,350 







As before, double weight was given to the direct barometrical result 

 on the common point, in this case Snowmass Mountain. The resulting 

 elevations show much greater range than in the Sawatch system, as 

 might be expected from the greater distance from the base, the great 

 range in elevation, over 2,000 feet, and the fact that the great Sawatch 

 range lies between these mountains and Mount Lincoln. 



Prom these peaks as bases, the following elevations have been meas- 

 ured by vertical angles, each result being, as before, the mean of several 

 independent measurements, giving suitable weights : 



ELK MOUNTAINS. 





Latitude. 



Longitude. 



Elevation. 



EASTERN KANGE. 



O / II 



39 9 

 39 4 30 

 39 11 

 39 5 

 39 15 54 

 38 57 40 

 38 54 



38 48 



39 7 12 

 39 30 

 38 58 30 



38 56 35 



39 1 

 39 12 

 39 13 

 39 2 

 39 2 

 39 

 39 8 

 39 4 

 39 5 

 39 6 



O 1 II 



107 4 40 



106 59 20 



107 4 



106 57 



107 9 50 

 106 53 

 106 30 



106 36 



107 3 44 

 106 38 40 

 106 55 10 



106 45 



107 1 

 107 4 

 107 2 

 107 2 

 107 

 106 52 

 106 52 

 106 51 

 106 51 

 106 48 



Feet. 

 13, 997 





14, 003 





13, 193 





13, 885 





12, 823 





13, 113 



Station 63 



12, 484 





12, 021 





13, 970 





14, 115 





13, 357 

 13,350 







12, 350 





12,050 

 12,000 



12, 240 

 13,0*) 



13, 400 

 12, 160 

 12,990 





12,780 





11,230 



