lO 



Sierra Club Bulletin. 



tions located in valleys are now of doubtful service 

 to the forecaster because the reports do not indicate true 

 cyclonic wind movements. 



It is of course no easy matter to erect, equip, and 

 maintain mountain observatories, and while it might be 

 possible to carry out the plan as outlined, it would prob- 

 ably be much better to place self-recording- apparatus on 

 the summits, properly exposed, and establish a series 

 of camps at levels of five, eight, and twelve thousand 

 feet. 



ELEVATION OF MT. RAINIER. 



Columbia Crest, summit of Mt. Rainier, July 25, 

 1905, II A.M. to 12 noon. Observers, J. N. L. and 

 A. G. M. Mercurial barometers, Green standard No. 

 1664 and No. 1554; four readings, 17.614, 17.616, 17.630, 

 17.632 inches. Temperature, mean, 39° F. Mean pres- 

 sure, corrected for temperature, instrumental error, and 

 gravity, 17.663 inches. Mean temperature of air column, 

 obtained from readings at summit and at sea-level, 

 50° F. 



Sea-level reading, mean of Tacoma, Seattle, Portland, 

 and Spokane, 29.960 inches. 



h — K = 56517 + 123.3 ^ + -003 h 

 (i+o.378-|-) (I +.0026 cos 2 </>) log|i 



which may be written 



log 29.960 = log 17.663 + 

 h — ho 



56517+ (123.3 X 50°)+. 003 h^' - /3) (I - y) 



h = 62^2^ X 0.229478 = 14,394 feet. 



The boiling-point as determined on the south rim 

 of the crater, probably one hundred feet below the true 

 summit, was 86°.4 C. (i87°.4F.). The equivalent pres- 

 sure would be 17.960 inches. We shall probably not be 



