CHAPTER IX. 



ASTRONOMY AND BAROMETRIC HYPSOMETRY. 



By Hobace P. Tuttle. 



SECTION I. 



THE ASTEONOMICAL WOEK. 



1. General remarks. 



My appointment was dated April 13, 1875, and I was ordered to re- 

 port to yon without delay, which I did on the 24th of the same month, at 

 Chicago, 111., and with the other members of the party arrived at Cheyenne 

 on the 27th of April. 



The funds at the disposal of the Department of the Interior, and which 

 could be used for the purpose of purchasing instruments for our outfit, 

 was very limited, but the Hon. E. P. Smith, Commissioner of Indian Affairs, 

 under whose immediate direction our part)' was, authorized the purchase 

 of one new marine chronometer, one sidereal pocket chronometer, and also 

 to hire one or more marine chronometers, as I might deem expedient. 



Upon my arrival in New York, I proceeded to the store of Messrs. T. 

 S. & J. D. Negus, where I found that they had selected for the expedition 

 one of their new marine chronometers, No. 1572 ; they also showed me a 

 Parkinson & Frodsham marine chronometer, No. 3192, which had an 

 extremely small rate, and which they offered to loan to the expedition. 

 As this chronometer was considerably lighter than the usual marine chro- 

 nometers, I at once signed a contract for its loan to the expedition. Sidereal 

 pocket chronometer, No. 54004, Duval, was purchased at the same time, 

 and performed most admirably during the time we were in the field. 



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