Aurora Borealis.
Bache, Alexander Dallas. No. 4 in **E.220a.20 Note of the effect upon the magnetic needle, of the
aurora borealis, visible at Philadelphia, on the 17th of May, 1833.
.Phile. 1833. 5 DPDpe 8°,
From the Journal of the Franklin institute, new series, vol. 12 ¥*4017.1.N.S.12).