32 



Manitou by observations between it and the depot of the 

 Rio Grande Railroad at Colorado Springs. The station in 

 Manitou was in the Beebee House, in a room on the second 

 floor on the rear of the building. In the height given, this 

 difference is allowed for, and the elevation is that of the 

 ground. The difference between our height and that of Dr. 

 Hayden's may be due to the difference in the location chosen 

 as the point to be measured, as this could easily be allowed 

 for on such rough ground. In measuring Mts. Lincoln, 

 Bross, Silverheels, and Quandary, we used Alma as a base, 

 and obtained its height by a careful series of observations 

 between it and a point the height of which was known, in 

 Fairplay. For the measurement of Mt. Princeton, we used 

 the height of Helena, as given by the surveys of the South 

 Park Railroad. For the measurements of Mts. Gray and 

 Evans, we took the height of the Clear Creek Railroad sta- 

 tion at Georgetown as a basis, and measured the height up 

 to our stationary barometer, which was in the Barton House. 

 In the measurement* of these last two mountains we com- 

 pared the two mercurials and one aneroid very carefully, 

 and left the aneroid below with an observer, Mr. Osborn, 

 and took the others to the summits of the two mountains at 

 the same time. It was our object to make simultaneous ob- 

 servations, in order to find out which of the two was the high- 

 er. In this we were successful, but were rather disappointed 

 in the day being stormy, and thus not giving us as good an 

 opportunity as we wished. 



Our barometers were our constant companions, although 

 we rode several hundred miles on horseback, and we usually 

 carried in addition to them the rest of our instruments 

 strapped to our bodies. We usually carried, besides the 

 barometer, a pocket-sextant, aneroid, level, thermometer, 

 clinometer and compass, and a telescope, together with our 

 notebooks. 



II. UTAH. 



Most of our barometric stations in our Utah measurements 

 were also the stations of our triangles, and have therefore 

 been already described in the topographical part of this 



