MAGNETIC OBSERVATIONS, 161 
ODSERV ATIONS— Continued. 
MAGNETIC DECLINATION AND INDEX ERROR OF NEEDLES. 
Station, Albuquerque ; latitude 35° 05 50” ; longitude Th. 06m. 31. 47s. 
Date. Needle. | No. of پیم‎ Magnetic € declina- iram error of Remarks. 
| vations. L eedle. 
1 o , ” , " | 
October 17 | 0 12 I$ pe | Poles reversed. 
tob 20 | 0 12 18. 35 90 | Poles reversed. 
October 18 | A 6 18:18 1 ds 14 3 
Ociober 19 | A 6 13 24 . 1 
Octobr 21 | B 6 13 22 41 ۰ Ji 54 
> 1 
Station, Cambridge Observatory ; latitude 420 22' 48” ; longitude 4h. 44m. 29. 6s. 
1850. | [e] , " H “ | 
August 9. 0 6 9 30 15 | 
August 9 A 6 9 41 25 de 4 
August 9 | B 6 9 30 45 — 30 
| MAGNETIC INCLINATION AND INDEX ERROR OF NEEDLES. 
1 
1 Station, Cambridge Observatory ; latitude 420. 22 48”; longitude 4h. 44m. 29. 6. 
à Date Needle. Hour Ther.| No. of ob- | Inclination. | Index error Remarks. 
Fah. |servations. of needle. ۱ 
185 3 G ° , ” ” 
August ٩9 C Ii mcs. 75 12 74 33 50 Poles reversed. 
August 9 | A Wem 15 6 74 23 00 | +10 50 
Augu 9 | 4 bei. 15 6 74 18 48 | 4- 15 02 
: August 9۱۸ 4 30 p. m-..| 75 6 74 19 20 十 14 30 
August 91 B 6 D. E TH 6 74 22 00 + 11 50 
August 9 ۱ 6501.15... 5 6 74 25 50 + 8 00 
š tation, Albuquerque ; latitude 359 05! 50” ; longitude Th. 06m. 31. 475. 
185. 0 [e] , ” , ” 
October 17|€ e 76 12 62 30 50 Poles reversed. 
October 20 | € 5D B... 74 12 62 25 35 Poles reversed. ` 
October 18 | ۸ LP 75 6 62.11.40 4.4.16 38 
October 18 | / 2m 15 6 62 14 30 + 13 42 
October 19 | / ۴۱ K. m. 73 6 62 08 25 十 19 47 
October 21, B Ja ۳ ll 13 6 62 20 20 + 7 52 
ا‎ 13 5b. 35 6 62 18 10 十 10 02 
Station, Zuiii ; latitude 350 07' 04.49 ; longitude Th. 13m. 16. 44s. 
Date. Needle. Hour. Ther. | No. of ob- Inclination. pe gis error Remarks. 
: Fah. | servation. f needle. 
1858... e" EST : : 
November 22 | C.. Ip ——— 76 12 62 01 47 Poles reversed. 
A November 21| B. 3pm. 74 6 61 55 30 十 6 7 
