126 P. E. Chase on Terrestrial 
upper line, as in Table I. Perhaps the principal utility of this ; 
table os be found in some future extension of these hb : 
ibits the | 
daily maxima and minima, and as it lends added weight ni | 
preceding tables, by ie that the monthly tide is a 
ular than the daily t tide. | 
Taste V. te $ y 
Lunar-Monthly Magnetic Tide of Total Force. 
Mean oi Jager ery at 5 eshte 
Position of Total For 
; 1844. rei 1846. jae, 
0 +00013 + 00015 -00018 + 00003 
15 +'00017 +00007 — 00008 06005 
30 6 “00000 +00007 00008 - 
45 +00018 +00009 +:00002 +00010 4 
+00023 — 00008 -00020 - 00002 
"5 +00028 —00015 ~ +00008 
+000138 -00012 +9007 2 
105 +'00005 00014 - 00006 — 00005 
120 -"00011 00003 -0001 - 00 
135 -'00026 00000 +00017 - 00008 
150 0001 009 +00011 = 000) 
165 00010 +00001 +00001 -"00008 
180 —"00044 009 +00015 —"00007 . 
195 —00024 +00007 + 00003 —"00005 
210 —00023 +00009 +00005 —"000 
225 --00038 ~"00002 +00012 -00099 
01 00000 —00016 -"00010 
255 --00006 -00001 —00009 --00005 
270 -0000 +00005 00011 -"00004 
285 0 +00007 — 000 +°00002 
300 | +00014 ~00004 | +00006 | +-00006 
315 | +00018 | +00004 | +00005 | +00009 
330 | 4 +000083 | 400010 | +00013 
345 +0024 -00010 000 +-00006 
It seems not improbable that the mutual planetary perturb 
tions which are sufficient] y powerful to affect their orbital - 
lution, may also exert an appreciable influence on their 2 
moon.’ The annual alata are ve reat, the intens 
being about +}, mae J or is nearest “2 carb an ord 
half as gre at, or only about when most remote. te 
bined Operation of the tropical Perchain: of a upiter, the é 
apsides, and the moon’s nodes, should produce a seri ries of 
tarbances corresponding very nearly in ssi with G¢ 
* If we take as our unit the , : M ee il 
about 177, and Jupiter's rh.  moon’s attraction for the earth pr" : ae 
