XXIV GENERAL RESULTS OF THE MAGNETICAL OBSERVATIONS. 
‘Taste 4.—Declination—Annual Variation for the Different Hours. 
peel Jan. Feb. | March.| April. | May. | June. | July. | Aug.*| Sept. Oct. | Nova") Dec: 




h é ‘ ‘ ‘ 4 ’ ‘ ‘ ¢ 
0 — 1-03 |—0-61 |— 0-53 |— 0-39 |—0-12| + 0:30 |+0-18 |4+.1-51 |4+ 2-27 | + 1-16 | — 0-87 | — 1-86 
1 — 1-98 | — 1-63 |} + 0-13 |+ 0-92 |—0-04 | — 0-07 | + 0-23 | 4 2-18 |+ 2-30 | + 1-00 | — 0-78 | — 2-25 
2 — 2-16 |—1-32 |+0-93 |+ 1-91 |4+ 0-31 |+0-95 | + 1-04 |4+ 1-83 |+ 0-75 | + 0-10 | — 1-76 | — 2-58 
3 — 2:03 }— 1-31 |4+ 0-18 }+ 1-33 |+ 0-35 | + 0-76 |4+ 0-58 |+ 2-18 |+ 1-16 | + 0-42 |— 1-26 | — 2.34 
4 — 1-32 |— 1-30 |+ 0-33 |+ 1-18 |4 0-46 | + 1-68 |+ 1-42 |+ 1-05 |+ 0-06 | + 0-25 | — 1-59 | — 2-26 
4) — 0-51 |+0-07 |+ 0-47 |4+ 1-12 |+ 0-69 | 4+ 1-53 |4+ 1-16 | —0-08 |— 1-18} —0-81 |— 1-23 | — 1-21 
6 — 0-01 |—0-24 |— 1-00 |— 0-24 |+- 0-22/+4 1-11 |+ 1-65 |+ 0-25 | — 0-42 | — 0-20 |— 0-38 | — 0-74 
7 = ||+0-40 | — 0-24 | — 1-22 |— 0-54 |+ 0-55 |+ 0-82 |4+ 1-52 —0-21 |— 0-55 | + 0-16 | —0-59 | — 0-10 
8 + 0-62 |—0-33 |+ 0-08 | — 0-95 |+ 0-41 | + 1-44 |+ 1-22 |+ 0-35 | — 1-24 | — 0-09 | —0-93 | — 0-60 
9 + 0-48 |—0-41 | — 0-45 |— 0-40 |+ 0-27 |4 1-26 |+ 1-17 |+ 1-14 | — 0-44 | — 0-48 | — 1-28 | — 0-81 
10 ||+0-17 |— 0-64 | —0-51 | —0-37 |+ 0-47 |+ 1-91 |+ 0-97 |+ 0-61 | — 9-43 | — 0-29 | — 1-24 | —0-62 
11 + 0-34 | — 0-56 | — 0-37 | — 0-22 |+ 0-39 | + 0-92 |4+ 0-82 | 4+. 0-33 |+ 0-72 | — 0-77 | — 1-19 | — 0-37 
12 |/+0-16 |+ 0-43 | — 0-70 |—0-50 | —0-21 |+ 0-64 |+ 0-58 |+ 0-88 |4+ 0-77 | — 0-84 | — 0-72 | —0-48 
13 +0-77 | —0-16 |— 0-80 |— 0-12 |— 1-12}+ 0-37 |+ 0-16 |+ 0-20 |+ 0-93 | — 0-15 | — 0-16 | + 0-07 
14 ||+0-80 |+ 0-80 }—0-38 |— 1-03 |— 0-93 |+ 0-01 | —0-38 |+ 0-13 |+ 0-44/+ 0-05 |+ 0-42 | + 0.04 
15 + 0-47 |+0-66 |+ 0-21 |— 2:07 |— 0.62 |— 0-74 |— 0-99 |+ 0-37 |+ 0-34 |+ 0-19 |+ 1-45 | + 0-69 
16 +0-71 |+0-80 |— 0-84 |—1-52|—0-71 |—1-35 |—0-37| 0-00 |—0-44|+ 1-34 |+1-20|+1-18 
17 + 1-36 |+ 0-64 |—0-50 | — 0-42 |— 1-08 | — 2-41 |— 1-06 |— 0-95 |4 0-09 | + 1-76 |+ 1-03 | + 1-56 
18 ||/+1-52/}+0-78 |+ 0-06 | — 0-88 | — 1-67 | — 2-10 |— 1-39 | — 0-65 |+ 0-40 |+ 1-81 |+ 0-97 |+ 1-17 
19 + 2-64 |4+ 1-20 |+ 0-39 | — 1-30.|— 2-78 | — 3-86 |— 2-15 |— 1-17 |4+ 1-22 | + 2-48 |+ 1-58 | 4 1-73 
20 + 2-10 |+ 1-36 |+0-17 |— 1-45 | — 2-15 | — 2-47 |— 1-69} — 1-44 |4+ 0-69 |+ 1-30 |4 1-57 | 4 2-02 
21 + 2-48 |+ 1-41 |—0-21 |— 2-65 |—2-17|—2-91|/—1-59| 0-00 |)+1-61 |+0-81 |+ 1-87 |+ 1-34 
22 + 1-32 |+0-99 | —0-.94 |— 1-72 | — 1-47 | — 1-19 |—0-78 |. 0-36 |4+ 1-74 |+0-90 |+ 0-47 | + 0-33 
23 + 0-09 | — 0-08 | —0-06 | — 0-67 |— 0-12 | — 0-61 | — 0-56 | + 0-47 |+ 1-35 | + 0-27 |+ 0-20 | —0-21 













In the above Table the variations for some hours represent the means of a greater 
number of years than those for other hours. The following Table exhibits the years 
that were made use of, in order to obtain each hour’s variation as represented 
above. Only complete years’ observations were used. 
















TABLE 5. 
Hou Years Employed 
G.M.T. Beg yee 
0 [84s 1844 easly [S46 lassen! cosa BT Krew. oahon dt Meee rmeicie || keteiocal lore ' 
(tw bemoeen 1844. | 1845 | V84G | -waces | -nsnes | ceecce | cewnes | seeees | oeneee | canscm 
2 1843 | 1844 | 1845 | 1846 |.1847 | ----- o | ceseee | ceeeee 1851 | 1852 | 1853 
CW RRA aS 1844 | 1845 aera bromoaee PAW ponte sell obct Ace | ecmmaconl | Mtnentce tcsote a 
4 WSASM US44an! ASAS MRSA GT | esse Ne ewames | ecerect | tees ete mearccice. |= alee AGN 
5 1844 | 1845 | «----. 1847°| 1848 | 1849 | 1850 | 1851 | 1852 | 1853 
6 1943): S44. | Pes TSAG al eects alactecctieal |: Assen eli eeenets, il wssanen lumeeete cee lice terete 
7H conte 1844 | 1845 | 1846 | .....- aca reil|” Veet Po oeeale. Pee cae ie cee . 
8 1843 | 1844 | 1845 | 1846 | 1847 eRe RS ie. £8 Fie 9 oe Sl rtche| |e ae | re caer 
Cpeaieeatcs 5 PQA Pe lice abe Sitti. ccm Rie Peete Meeietegeatsi I asap oy c]l ee areieysree ol eevee acl |e Reese 
10 1843). 1844 pega iTeagie re cea sass. Cie ss see Ral eere ae (SSSA AE 
i amen eee TS4A: |) DSi Bape covets te wowiseoan | errs oral Maree etow ll aaies ecco." |lnroetteerel lik crested AAA 
12 POC orang Go ©: aI IeoY sepa arise Wariner cue | wocbscin-clnctoon Mabe Bored Mkcnaseo:, |ktoctoo al iigesic F 
13 poy. Sl oy boa eee Re | erm ce Bc ccet| wcamereal RocGs allimtc Hoes aes 
14 ar S44 mS aiealeences seo iectetl' | oeew ioe All aoe See Seel! meceate alktemerecmal| mete she 
15i wlbeesaes TS445\| S1S ae leseacealcerione se REED hrwmereaaae | ee teoaetal Masi ee een ie eee 
We leases TSA. | TP SAB A ect Mectesteeall| ected aemeinee tecevaeer amen asia, jee ote 
17 Wi cedeos PS44: | PSA | cere. Al Nore ea iemectcctereree ollencteece es call ectasa crate elec eral neta 3 
18 [S48 S44: || 1 S45E l SSAC A) ccrcenen lt sect meee meeee ae bar tlie ctetseey | scat 
kO>. xedee USA TS 45 ile seen Pall taaieisnts.. | ccaenerek lacie || ermaicel aes 
20 1843 | 1844 | 1845 | 1846 | 1747 | esos | -oeeee | -----e 1851 | 1852 | 1853 
OY Pallipaceees 6 SAA CISA | ecm erecta lm ecto etee leer Gall Sint hae ltetcees AEE. Sal eel eeu ey ooeeee f 
99 1843 1844 1845 TS46 | weccae ML Stetecalaie i Veietiate lai pie isiancasullll | yaypintsta lt Matewe watee si) Mesteteiteete 
OB} |) oeoano 1844 | 1845 | 1846 | 1847 | 1848 | 1849 | 1850 | 1851 | 1852 | 1853 4 


