12 



Sierra Club Bulletin. 



Whitney, i86°.47 F. (Hallock 1903). 

 Rainier, iSy°.4 F. (crater readings). 



Estimated summit reading, 186° .8. 

 Shasta, iSf.yF. 

 Muirs Camp, 194° F. 



Estimated height, 10,000 feet. 

 Paradise Valley, Sierra Camp, 202°. 4 F. 



Estimated height 5,700 feet. 

 Horse Camp, Mt. Shasta, i98°.5 F. 



Estimated height, 7,900 feet. 



Observations based upon pressure determinations are 

 confessedly less exact than those made by vertical angles 

 or by levels. It is fully recognized in the above deter- 

 mination that the mean temperature of the air column 

 may be in error. If air were at perfect rest, which 

 it seldom is, a mean value might be obtainable; but on 

 both dates mentioned we observed a marked stratification 

 of the air, and under such conditions temperature and 

 humidity values are indeterminable. Above the level of 

 10,000 feet the drift of the air appeared to be entirely 

 dijfferent from the drift of the lower level. The humidity 

 values, in the opinion of the writer, cannot be properly 

 obtained without a series of simultaneous readings at 

 probably not less than five points in the air column. 



HISTORICAL. 



The first estimate of the height of Mt. Rainier was 

 made by Captain George Vancouver on Saturday, May 

 26, 1792. He had named the " round snowy mountain " 

 on Tuesday, May 8th, after his friend, Rear-Admiral 

 Rainier. No one had a better right to stand sponsor. 

 The names which he gave to the peaks, bays, channels, 

 and islands of the North Pacific coast, — Hood and 

 Baker, after Lord Hood and Admiral Baker; Puget 

 Sound, after his first mate, Peter Puget; the Straits of 

 Georgia and Queen Charlotte Sound, after king and 

 queen, — have all been graciously accepted and remain 



