Pee aT ke, 
Magnetism as a Mode of Motion. 125 
moon (at or near 240° and 46°), low temperature 
ucing a minimum of horizontal force, with a maximum 
of vertical force, and vice versd. From the variations of hori- 
zontal force (=) and vertical force (=) given in this table, 
. Maes 4 : 
table V is formed, the mean variations of total force (=) being 
Taste IV, 
Lunar-Monthly Magnetic Tide. Differences from Monthly Means. 
F nef Horizontal Force. Vertical For ce, | _Means. 
ee a ee | 1846 1844. | 1845 1846. BF. |_V.F 
0 |+-38| 454 |--02 | +59 | +51 | -166-| +380 | -16 
15) + 78 | 408 | +84 | +88 | -+ 55 | —1-92 +3 10 
80 | 4127 | —86 | + -88 =50 | + 53 | = ‘57 +58 | -19 
45 | +1391 +40 | + -91 -—50 | + 25 | -1-16 +90 | 48 
60 168} -81 | ~-94 38 47 | =143 >| +19 | "45 
78 | +083} =85 | 4-44 | -91 | --12][--90 | +47 | -“4 
0 |+ 80} —41 | + 64 -'18 ST | = *85 +87 | -87 
105 | +44} --10 | —-48 21 | -1:08 | + 19 05 | -37 
) |- 46} +22 | --93 | -80 | --58]/ 4-53 | -39 | —12 
5 | -151 | +39 | 44 | =07 | = 60 | +2°18 ~52 | +50 
) 1-70} -2 - 46 —98 |-- 50 | +211 -55 | +44 
5 | = 39 | +25 | -1I8 3 — 80 | +1°90 =-44 ! +42 
D | 212} 470 | = -04 | -TT | = 28 | +142 49 | +18 
b | -154 | +43 | - 68 +15 | + 02 | +117 -58 | +43 
0 | -158 | +36 | - 26 +31 | +26 | + “76 —48 | +44 
225 | -2:05 | -80 | -- = 34 [+ 26 | +127 -'83 | +39 
240 | -127 | —41 | -1in | +57 | +6 7 Ne 
255 | - 58 | -29 | - 2 +83 | + 52} - °48 36 | +12 
210 | = 48 | 4:22 | --95 | #17 [+ 08) = 58 Ky | =49 
285 | - 04] +60 | +20 | +10 | - 80] - ‘51 | +26 | ~24 
800°} +71 | ~39 | 4-51 | +28] + 26] = 21 | +28 | +09 
el) 87) lL | 44 +34 |-+ 361 = 17 +40 | +24 
380 | ser] 4+ +149 | +66 | - 09| -184 | +98 | ~2 
345 1 +128 | +24 9 4°35 56 | -118 +64 | -*45 
on ; fc ae 
obtained by the formula 4 — 093? g5* + sin® I+. I have 
taken 6=—29°; one scale division of horizontal force ="000194 ; 
one division of vertical force =°000792; which are almost iden- 
tical with the values employed by Gen. Sabine in the computa 
tion of his tables of hourly variation in solar and lunar total 
my deductions, ‘The first decimal figures are placed in an 
Au. Jour. Sci.—Seconp Szegums, Vou. XXXIX, No. 116,—Manrca, 1866. 
17 
