122 



ON THE NUMERICAL RELATIONS OF GRAVITY AND MAGNETISM. 



TABLE IV. SOLAR-DIURNAL MAGNETIC, BAROMETRIC, AND THERMOMETRY VARIATIONS AT ST. HELENA 



T3 



o 



§ J 



5 



(A). Observed 



Magnetic 



Variations. 



(C). Hourly 

 Differences. 



(B). Theoretical 



Magnetic 

 Variations. 



(D) Hourly 



Differences. 



M 



1 



< 



a 



1 



o 



Observed 



Barometric 

 Differences. 



Hourly 

 Thermo metric 



Differences. 



0"' 



+ 00095 



—.00013 



+.00098 



—.00021 



h 00002 



+.00008 



+.0164 



+839 



1 



+ .00082 



—.00022 



+ .00072 



—.00020 



+.00010 



—.00002 



—.0002 



1 .215 



2 



+ .00060 



—.00020 



+ .00052 



—.00018 



+.00008 



—.00002 



— 0161 



—.807 



3 



+ .00040 



— 00020 



+ .00034 



— 00015 



+.00006 



—.00005 



—.0268 



—.581 



4 



-(-.00020 



—.00019 



+ .00019 



—.00014 



+.00001 



—.00005 



—.0300 



—.934 



5 



+ .00001 



—.00016 



+.00005 



—.00013 



—.00004 



—.00003 



—.0259 



—1.054 



6 



—.00015 



—.00011 



—.00008 



—.00010 



—.00007 



—.00001 



—.0179 



—.717 



7 



—.00026 



—.00010 



—.0001.8 



—.00008 



—.00008 



—.00002 



—.0057 



—.336 



8 



—.00036 



—.00005 



—.00026 



—.00007 



—.00010 



+.00002 



+.0078 



—.239 



9 



—.00041 



—.00004 



—.00033 



—.00004 



—.00008 



+.00000 



+.0182 



—.162 



10 



—.00045 



.00000 



—.00037 



—.00003 



—.00008 



+.00003 



+.0240 



—.175 



11 



—.00045 



+ .00002 



—.00040 



—.00001 



—.00005 



+.00003 



-I-.0204 



—.161 



12 



—.00043 



+.00002 



—.00041 



+.00001 



—.00002 



+.00001 



+.0092 



—.146 



13 



— .00041 



+ .00003 



—.00040 



+.00003 



—.00001 



+.00000 



—0044 



—.182 



14 



—.00038 



+ .00002 



—.00037 



+.00004 



—.00001 



— .00002 



—.0175 



—.184 



15 



—.00036 



+.00001 



—.00033 



+.00007 



—.00003 



—.00006 



—.0259 



—.089 



16 



—.00035 



+ .00001 



—.00026 



+.00008 



—.00009 



—.00007 



—.0271 



—.088 



17 



—.00034 



+ .00002 



—.00018 



+ .00010 



—.00016 



—.00008 



—.0210 



—.027 



18 



—.00032 



+ .00012 



—.00008 



+ .00013 



—.00024 



—.00001 



—.0084 



+.204 



19 



—.00020 



+.00023 



+.00005' 



+.00014 



—.00025 



+.00009 



+.0077 



+.707 



20 



+.00003 



+ .00031 



+.00019 



+.00015 



—.00016 



+.00016 



+.0227 



+1.117 



21 



+.00034 



+ .00029 



+.00034 



+.00018 



—.00000 



+ .00011 



+.0342 



+.943 



22 



+.00068 



+ .00022 



+.00052 



+.00020 



+ .00011 



1 .00002 



+.0868 



+ .943 



23 



+.00085 



+ .00010 



+.00072 



+.00021 



+ .00013 



— .00011 



+.0290 



+ 814 



