STATE AGRICULTURAL SOCIETY. 



359 



State Weather Services, by sending reports of observations, taken in their 

 respective localities, to a central office, where weather forecasting is done 

 and warnings sent out each day by telegraph and railroad signals to every 

 portion of the State, of the character of the weather that will come or be 

 expected in any given locality for the following twenty-four hours or more. 



Careful observations taken daily during the past year; relative humid- 

 ity ; barometrical pressure; monthly meteorological synopsis; monthly 

 rainfall tables, taken by James Hutchison; synopsis of Oakland climate 

 for ten years past, and table of comparative annual meteorology. 



Observations taken at 7 a. m., 2 r. M., and i) p. m. of each day, by J. B. 

 Trembley, M.D.; latitude 37° 48' 20" north, longitude 122° 15' 20" west; 

 height of barometer above the sea, 24 feet. 



BAROMETRICAL PRESSURE. 



Table showing the mean, highest, and lowest monthly barometer; also, the monthly range, 

 rometer not corrected for elevation or temperature. 



Bo- 



1886. 



Mean 



Monthly 



Barometer. 



Highest 

 Observed 

 Barometer 



for Month. 



Lowest 



Observed 



• (urometer 



for Month. 



Range 



for 

 Month. 



January ... 

 February - . 



March 



April 



May 



June 



July 



August 



September 



October 



November . 

 December . 



Means ... 



32.01 

 30.02 

 29.99 

 29.87 

 29.97 

 29.89 

 29.87 

 29.87 

 29.87 

 29.96 

 30.08 

 30.09 



29.96 



:«».2!i 

 30.27 

 30.20 

 30.17 

 30.77 

 30.08 

 30.02 

 : '.alio 

 36.01 

 30.22 

 30.30 

 30.30 



29.26 

 29.65 

 29.62 



29.55 

 29.82 

 29.70 

 29.76 



29.73 

 29.7H 

 29.82 

 29.64 

 29.87 



1.03 

 .62 

 .64 



.62 

 .35 

 .38 

 .20 

 .27 

 .23 

 .40 

 .66 

 .43 



30.22 



29.60 



.53 



Barometrical Recapitulation. 



Mean barometer for the year 29.96 



Maximum barometer for the year, December 12, 7 A. m 30.30 



Minimum barometer for the year, January 18, 11 p. m 29.26 



Highest monthly range for the year 1.33 



Lowest monthly range for the year .26 



Yearly range .53 



