APPENDIX E. 



OBSERVATIONS FOR DETERMINING THE HORARY OSCILLATIONS OF 



THE BAROMETRIC COLUMN. 



Data* from ichicli Table No. 1 of corrections for the horary oscillations of the barometric column 



has been deduced. 



* These data consist of hourly barometric readings, taken at Fort Reading, Cal., and reduced to what they would have been, had the temperature 

 of the mercury been 32" Fahr. Barometer used, No. 1060. 



f The reading at this hour was omitted. This assumed value has been found by careful interpolation from tin- constructed daily curve. 



Data* from which Table No. 2 of corrections for the horary oscillations of the barometric column 



has been deduced. 



* These data consist of hourly barometric readings reduced to what they would have been, had the temperature of the mercury been 32° Fahr. 

 Those on August 27 and 28 were taken at camp 37, and the remainder at camp 38. Both these camps were near the head of Des Chutes valley, and 

 only about three miles distant from each other. Barometer used, No. 1060. 



t The reading at this hour was omitted. This assumed value has been found by careful interpolation from the constructed daily curve. 



