SURGEONS' REPORTS CALIFORNIA NORTHERN DISTRICT. 



483 



Table of successive hourly ranges of barometer for 1857. 



Hours. 



/ a. m . 



8 a. Ill . 



9 a. m . 



10 a. in . 



11 a. Ill . 

 laiu... 



1 p. m 



2 p. ni . 



3 p. ni . 



4 p. m . 

 ."j p. m. 



6 p. m. 



7 p. m. 



8 p. Ill . 



9 p. ni . 



10 p. 111. 



11 p. m. 



12 p. 111. 



1 a. m . 



2 a.m. 



3 a.m. 



4 a. m . 



5 a. m . 

 (i a. m. 



Sums . 

 Means . 





-f .044 

 + .041 

 + .041 

 + .03(i 

 + .031 

 + .028 

 + .Ol.'-i 



— .029 



— .0;!3 



— .053 



— .029 



— .031 



— .028 

 -.020 



— .023 



— .047 

 + .002 

 + .002 

 + .005 

 + .005 

 + .010 

 + .013 

 + .015 

 + .013 



600 



.025 



1186 



.049 



1078 



.045 





+ .098 

 + .098 

 + .103 

 + .101 

 + .083 

 + .053 

 + .031 



— 010 



— .029 



— .047 



— .135 



— .054 



— .060 



— .048 



— .040 



— .019 



— .011 



— .o:;o 



— .027 



— .025 

 .022 



— !oi9 



— .019 



— .022 



1084 

 .045 



— .008 



— .016 



— .012 



— 008 

 -.010 

 -.040 



— .037 



— .040 



— .052 



— .059 



— .056 



— .035 



— .026 



— .024 

 + .002 

 + .040 

 + .043 

 + .045 

 + .048 

 + .051 

 + .053 

 + .051 

 + .043 

 + .034 



83C 



.035 



+ .052 

 + .042 

 + .03H 

 + .048 

 + .04S 

 + .041 

 + .018 

 + .014 



— .007 



— .019 



— .031 



— .019 



— .046 



— .058 



— .037 



— .027 



— .016 

 + .012 

 + .015 

 + .007 



— .005 



— .012 



— .024 



— .028 



C64 



.028 



+ .028 

 + .036 

 + .042 

 + 044 

 + .039 

 + .037 

 + .020 



— .008 



— .014 



— .012 



— .031 



— .046 



— .038 



— .017 



— .Ol'J 



— .010 



— .007 



— .009 



— .012 



— .013 



— .013 

 -.011 



— .019 

 .000 



516 



.022 



— .024 



— .024 



— .032 



— .014 



— .002 



— .017 



— .018 



— .038 



— .038 



— .046 



— .050 



— .056 



— .033 



— .018 



— .005 

 + .030 

 + .023 

 + .026 

 + .028 

 + .031 

 + .030 

 + .065 

 + .086 

 + .108 



S 



+ .057 

 + .061 

 + .075 

 + .078 

 + .067 

 + .052 

 + .031 

 + .009 



— .007 



— .025 



— .032 



— .032 



— .053 



— .035 



— .024 



— .022 



— .019 



— .021 



— .016 



— .013 



— .020 



— .033 



— .045 



— .020 



842 



853 



.0.35 .030 



+ .080 

 + .095 

 + .092 

 + .084 

 + .079 

 + .062 

 + .037 

 + .008 

 .000 



— .024 



— .030 



— .030 



— .018 



— .039 



— .036 



— .045 



— .038 



— .032 



— .030 



— .034 



— .040 



— .035 



— .0,52 



— .046 



1066 



.044 



S 



+ .056 

 + .044 

 + .053 

 + .065 

 + .038 

 + .025 

 + .014 

 + .006 

 + .004 

 + .006 



— .003 

 + .013 

 + .016 

 + .002 

 + .004 



— .005 



— .005 



— .009 



— .019 



— .032 



— .046 



— .066 



— .086 



— .080 



703 



.029 



+ .117 

 + .117 

 + .122 

 + .127 

 + .107 

 + .078 

 + .047 

 + .029 

 + .004 



— .002 



— .017 



— .021 



— .027 



— .036 

 + .037 



— .039 



— .042 



— .051 

 -.064 



— .006 



— .074 



— .074 



— .091 



— .100 



1495 



.062 



.038 



The mean successive daily ranges in snmraer frequently do not amount to more than ninety- 

 four thou.sandths of an inch. 



The following calculation, from the reading of :he Smithsonian barometer, during the last two 

 years, substantiates this fact : 



Sarovieter. 



Date. 



January 22... 

 February 23.. 



March 23 



April 29 



May 22 



June 22 



July 22 



Augu.st 28.. -. 

 September 23. 



October 21 



November 27.. 

 December 33.. 



Daily mean. 



30. 

 30. 

 30. 

 29. 

 30. 

 29. 

 29. 

 29. 

 29. 

 29. 

 30. 

 30. 



233 

 018 

 139 

 948 

 007 

 889 

 856 

 905 

 922 

 986 

 225 

 155 



Hourly mean. 



Difference. 



30. 237 



29. 976 



30. 172 

 20. 932 

 30. 031 

 29. 879 

 29. 855 

 29. 927 

 29. 908 

 29. 969 

 30. 203 

 30. 120 



Mean flifferenee. 



+ 0. 004 



— 0. 042 

 + 0. 033 



— 0. 016 

 + 0. 024 



— 0.010 



— 0.001 

 + 0. 022 



— 0.014 



— 0. 017 



— 0. 022 



— 0. 035 



0.020 



