894 Effects of the Aurora on Telegraph Lines. 
Brussels, Paris, and London was interrupted. The 1° foll oN 
servations were made at the Observatory of Bru 
‘Declination |Hor. m. |, * Declination, | Hor. Inten 
Date. Pia Mis, Min. pie totin. My Date. Max. Min, Max. wi, 
| Boke. a; 
sg ada : : 10 a. M.54-75 57° 65/10-43 | 6. 95 Sept. 2, 9h Om p.m. sir 5.64 
oll * 53: 62 59°40) 9 = —_ 53:47 804 | 
Whe 12 ‘53°72 58:15| 0-30 ee Sept. 3, bel de M. he 17 58-23) 4:89 4: 
a to lP.M (M5206 el oo 736 10101 a = = EBs: — : 
tow “ -34 62°81 to 5 
2 re," “43-40 57-87 \17-7 12to 1p, M..50-59 53:63 10°64 740, 
- to : . Bec adios 53 10°12 : c) “ ie aa Hi 
_ 4 to 1-15 55-00)14-01 10-48 1 * 151-63 51:90 1 
5 54-75 10°24 Bto 4 [48-37 51-52 13-75 
6 0 54-44 8-87 4 30m 52 
yee 56:67 7-80 5 0 53:50 
8 24 56-59 7-21 9 O98 57-58 
6. it of the Aurora upon the Telegraph Lines of Wurlem- 
urg; from Poggendorff’s Annalen, Band 108, p. 506. 
uring the night of Aug. 28th, from 11 15™ P. M. to near 
noon of the 29th, “there was Svmaseod from time to time onall re 4 
graph lines proceeding from Stuttgard, an oe oy 
traction of the armatures, which continued from 20 to 4 
Carisruhe, and last on a i o line. This ate 
repeated et 5 or 10 m , and, towards morning, 
or 8 minutes. After 5 oreo only ‘bell signals could 
very remarkable. Ina ces minute the needles changed te 
position 5 or 6 times even to 40° west. While on the Ulm hine 
the deviation was easterly, on the Bruchsal line the deviation 
was westerly. 
The cause of this phenomenon is found in a brilliant aurora 
which was everywhere observed from 9 P. M. Aug. 28th till 
wards morning of the 29th. 
7. Effects of the Aurora upon the sere Lines of Prussia; 
from Poggendorff’s Annalen, Band 108, p . 50E 
The electrical currents on the conducting wires exhib 
themselves in violent deflections of the g cp, 
needles swung violently from 30° to 70° to one side, 
slowly to zero, and then moved slowly to the other side. 
the line proceeding from Berlin westward, the distur 
menced between 1 and 2 o’clock on the morning of Aug.? : 
‘when all connection with the stations ceased. oti ce had, 
viously been received of disturbance at the easterly. 
Konigsberg, Kowno, Riga and Petersburg. During We 
