Compasse
Bache, Alexander Dallas. Noe 4 in **—£.220a.20 Note of the effect upon the magnetic meedle, of the aurora borealis, visible at Philadelphia, on the 17th of May, 1833. Phila. 1833.) 5 pp. 8°. From the Journal of the Franklin institute, new series, VOle 12 _*4017.1.N.S.12 .