60 



OBSERVATIONS FOR DETERMINING THE HORARY OSCILLATIONS, ETC. 



Data* from which Table No. 3 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 3-2° Falir. Barometer used, No. 1060. 



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



