XXV1U GENERAL RESULTS OF THE MAGNETICAL OBSERVATIONS. 
TABLE 10.—Horizontal Foree—Annual Variation for the Different Hours in 
Parts of Force. 

MT Jan. | Feb. | March.| April. | May. | June. | July. | Aug. | Sept. Oct. | Nov. | Dec. 












-00 -00 -00 -00 -00 -00 -00 -00 -00 -00 -00 -00 
O |/+084 |+067 |—022 |—091 |—038 |+002 |—012 |—041 |—062 |— 031 |+040 |+105 
1 +042 |+039 |—030 |—078 |—022 |+029 |+011 |—023 |—033 |—039 |+036 |+ 067 
2 |/+016 |+012 |- 017 |—021 |4+003 |+039 |+014 |+015 |—007 |—051 |—016 |+013. 
3 — 023 |—016 |—028 |—043 |—002 |+067 |+056 |+034 |—016 |—030 |—003 |+006 
4 —057 |—037 |—011 |—014 |+037 |+058 |+086 |+036 |—008 |—037 |—038 |—015 
5 —070 |—053 |—025 |+040 |+099 |+094 |+086 |+033 |—024 |—060 |—077 |—044 
6 
if 
8 
9 

—087 |—089 |}—048 |+023 |+107 |+082 |+114 |+071 |—018 |—076 |—040 |—041 
—100 |—089 |—061 |+033 |+097 |+098 |4+126 |+061 |—039 |—074 |—038 |—015 
—080 |—068 |—014 |+013 |+098 |+111 |+104 |+061 |—043 |—092 |—066 |—024 
: —077 |-—057 |—039 |—007 |+063 |+098 |+096 |4+052 |—019 |—032 |—040 |—038 
10 —040 |—032 |—016 |—002 |4+035 |+080 |+074 |+021 |—041 |—028 |—033 ;—019 
11 —067 |—065 |—057 |+010 |+032 |+086 |+061 |+047 |+006 |—011 |—021 |—023 
12 —059 |—050 |—022 |—011 |+019 |+062 |+062 |+029 |+014 |-017 |—019 |—009 
13 —056 |—023 |—030 |—042 |+006 |+066 |+060 |+034 |—008 |—005 |4+005 |— 006 
14 —051 |—029 |—078 |—033 |+006 |+058 |+053 |4+017 |4+012 |+008 |+021 |4+016 
15 —074 |—024 |—071 |-—078 |+009 |+065 |+058 |4+022 |—001 |+021 |4+038 |+035 
16 —027 |—036 |—049 |—056 |—016 |4+042 |+033 |+009 |—001 |+031 |+041 |4+028 
We —009 |—028 |—055 |—055 |—031 |+029 |+014 |+008 |—003 |+029 |+051 |+051 
18 ||+033 |+011 |—018 |—012 |—038 |—024 |—025 |—048 |—023 |+015 |+054 |+075 
19 |/+018 |+006 |—016 |—045 |—040 |—O016 |—014 |—039 |—026 |+012 |4+076 |+084 
20 ||/+093 |+050 |+033 |—011 |—051 |—033 |—049 |—078 |-—097 |—012 |+064 |4+092 
21 +075 |+069 |—022 |—079 |—065 |—024 |—025 |—089 |—061 |+002 |+094 |+127 
22 {+121 |+093 |4+002 |—072 |—053 |—039 |—045 |—105 |—097 |—025 |+068 |+153 
23 +105 |+060 |—017 |—054 |—027 |—005 |—039 |—046 |—103 |—050 |4+052 |+122 














The years that were made use of in order to obtain each hour’s variation, as re- 
presented in Table 10, are those exhibited in Table 5, with the exception of the 
year 1843, which it was thought advisable to leave out. 
The following Table exhibits the annual range for the different hours as deduced 
from Table 10 :— 
TasLE 11.—Horizontal Force—Annual Range for the Different Hours 
in Parts of Force. 

Hour 
amt} Ge eer eg TRS gh eg atonal a ett ete ae 
‘00 00 00 00 00 00 ‘00 00 “00 ‘00 “00 00 
Range, 196 |.145.|'090 | 110 } 148°) 176) 208 | 226 203 | 175 | 121 | tos 




Hour 
aunt} 1 Wi i is Se 0 I SSeS sh GE Rs ie 
‘00 00 “00 ‘00 “00 ‘00 00 00 -00 “00 -00 00 
Range, 121 | 122 | 136 | 145 | 098 | 106 | 123 | 129 | 190 | 216 | 258 | 225 



From this Table we deduce a conclusion similar to that derived from Table 6, 
viz., that for horizontal force, as well as for declination, the ranges of the annual — 
variation are greater for the hours of the day than for the hours of the night. We 

