146 A. D. Bache on Magnetical Observations in Maine. 
The values for Eastport have been derived as follows: 
Correct’ns 
| Corrected Annual 
dig phe fer Sactiaatn: inequality. 
Auy., 5 | 407 61°2 +0°55 
Sept., 60°7 +0°6 61°3 +065 
Oct., 5 | 405 61-0 40°35 
Nov., 623 | +0°3 62°6 1:95 
Dee., 606 | 40-2 60°8 40°15 
Jan., 60°6 +0°1 60-7 +0-05 
Feb 04 | -O'1 60-3 -0°35 
March, 60°4 -0'2 60°2 -045 
April 12 | -0-3 60-9 +025 
ay, 60-2 | -05 59-7 -0°95 
June, 60°5 -0°6 59°9 -0°75 
July 60-0 -0°7 59°3 1°35 
The following comparative table contains the annual inequal- 
ity sa Sopa Philadelphia and Toronto, the latter ele three 
different epochs, the last two of which are derived fi r. 
scion paper on “Monthly absolute values ‘of the po 
elements at Toronto, from 1856 to 1864 inclusive :” 
Annual iP, lags of the Magnetic Declination. + indicates west 
deflection, — east deflection from Normal declination. 
pose t, ‘ on yee (Tene oe Vovoate. 
1s60-67 | 18tu-45. | 1sks-s!. | 186-59. | 1860-64 | 16 years 
Jan., +05 +05 #04 Bo +0°10 +0 03 
Feb -0°35 +04 -05 +0 2 -0°35 -—0°28 
March, -0°45 -01 -02 +05 -014 ) 
l, 0°25 -O1 0-0 +U 1 -031 -007 
ay, -095 $02 0-1 -04 -0 67 -0°35 
June, —0°75 -06 -0'5 -0°7 +0°03 =38 
July, -1°35 -1:0 -08 -0°5 +0 30 -0°38 
Aug., 055 —0°9 —(2 —09:1 +0-19 0°06 
Sept 0 +007 +07 013 +052 
Oct +035 -0'2 10 00 +0°40 +056 
Nov., +0°9 +03 +01 41 +029 
Dec +015 +07 +03 +01 -007 Hild 
The general agreement of the Eastport, Philadelphia, and 
the approximate Tesemblance of the Toronto (i6 year) curves 
is shown on the aearas mga the annual range kee 
period, a 
observations. The effect of the annual inequality is to diminish 
the west declination in 5 uly and to increase it in on 
these being the months when it reaches its greatest amount. 
2. Dip.—The series of observations and results extend fr oes 
saseary 1860, to July 1864, during which period the 
ments and observers were changed several times. Ape 
discussion of the observations of 1860-61-62 showed an Lt 
, 
i 
4 
if 
