Astronomy. as 69 
threads may be stretched across the hole in the paper, and thus fur- 
ther assist the eye in the comparison of the map with the heavens. 
The writer has himself profited much by this arrangement, he 
having punctured a common star map for the purpose. 
4, € 
isconsin Meteorite; by I. A. Larpuam.—Two addi 
first four days. 
T=Dec. 20°1155 mean Berlin time. 
no 92" 96 G0" 
{145° 19’ 53” | mean eq. 1871. 
i=102° 7' 40” 
log g=9°87628 
The resulting ephemeris gives a south declination of 37° 4’ on 
the 5th of December. 
cause it. 
Professor Airy writes: “The day was one of magnetic disturb- 
ance, but it does not appear that any remarkable movement coin- 
cided with the beginning of your observation. There was a sudden 
movement nearly at the end.” : 
About 24 hours after the “explosion,” the magnetic storm 
A which developed into the beautiful aurora of that evening. 
* Vol. xlvii, p. 271, March, 1871. 
