



TABLE OF CONTENTS. 



Page. 



Order of sequence for an astronomical report 7 



Abbreviations and signs 8 



Cheyenne station .11 



Description of observatory 12 



Description of instruments used 13 



Connections, (telegraphic) 13 



Tabulation of stars used 14 



Instrumental values 15 



Uniform tables of time reductions at sending and receiving stations 16-27 



Correction and rate of chronometers 28 



Grouping of series of exchange of signals 29 



Personal equation 3 



Probable error 30 



Resulting longitude 3 



Reduction of the latitude observations 31-44 



Mean places of stars used for determination of latitude 31 



Observations for latitude 32-38 



Computations for latitude 3Q-44 



Resulting astronomical co-ordinates 45 



Colorado Springs station, Colorado Territory 49 



Geographical position of station 49 



Physical-geography details 49 



Meteorological conditions 50 



Description of observatory 50 



Description of instruments used 51 



Points of connection 52 



Tabulation of stars used for time 53 



Corrections and rates of chronometers 64 



Signals for determination of longitude between Salt Lake City and Colorado Springs 65-67 



Final results for longitude 68 



Mean places of stars for 1873 used for determination of latitude . 69 



Observations for latitude 70-73 



Computations for latitude 74~?6 



Discussion of probable error 77-?8 



Astronomical co-ordinates 78 



Instructions for conducting observations, field-season of 1873 



