made at Beverly. — T 421. 
Variations determined by magnetic azimuths, taken at equal - 
.altitudes of fe fun, forenoon and afternoon. 
oiri 6. 
. M. Difference. E Diff. Variation. 
68° 28’ 829 30/ 149 2! 4S Sw. 
65 30 79 20 13 50 6 
63 50 7] 35 13 45 52% 
63 30 97: 3$ 13 45 6 52% 
63. 0 97. 50 14 O 7-99 
62 30 46 42 14 2 / ES | 
Mean variation by the above fix mae of Auguft 6, 6 57 
Equation for change of declination + 4 
Variation, Ae: 
67 30 81 30 14. 0 4.3» 
61-20 8r. EPETI 6 57% 
66 42 80 40 13 $8 6 $9 
6 15 80 18 i473 ? WG 
$6 3 5 19 4] 13.53 6 565 
64 45 78 40 13 55 6 57i 
64° 12 ;8 8 13 56 6 58 
63 58 77 48 13 $0 6 55 
63H TEUSS 13 58 6 59 
63 0 77 14 1:3 
61 46 75. 45 13- 49 6 59% 
61. 20 44-26 14 y 
60 58 74 50 13: 14 6 55. 
58 50 72 45 ij £5 6 57% 
58 3o 72 25- 13 55 6. 
yp 72 10 13. 55 pot vu ý 
57 40 7i 30 13 50 6 55 
$7 10 qo 58 13 48 6 54 
56 43 70 42 13 59 6 59% 
Mean variation hy the above nineteen obfervations, 6 58} 
Equation for.change of declination, «gy 
Variation by nineteen age nate o Auguft mi 4 gi 
Ditto fix Nr 
Ditto five 6 59% 
Ditto feven July 35 6 597 
Ditto five E 2: est 
Ditto feven .28, 9. 0 
Ditto eight 27 7 } 
Varian. by tl rof feven days,contaimingfifty-feven obf. 7 2 
