156 



Stiles's Auroral Observatio7\s. 



24 



25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 



1772, 



1773, 



1774, 



1775, 



July B. Great A.B. 9'^ -iO™ to 10'^ and more. The streams 

 reached nearly to the zenith, and broad sheets of light fre- 

 quently ascending out of the north, and passing 60° or 70° 

 in a second. The coruscations Avere white ; little red. 



Great A.B. at 9'' evening. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Extraordinary Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Aurora Borealis. 



Atcroras observed at Dlghton, 3Iass., Lat. 41° 48', Long. 71° 8' W. 



38 

 39 



1777, Jan. 28. Aurora Borealis. 

 " Mar. 5. Aurora Borealis. 



Auroras observed at Portsmouth, N. H., Lat. 43° 4', Long. 70° 45' W, 



40 

 41 

 42 

 43 

 44 

 45 



1777, July 27. 

 " Sept. 24. 

 " Nov. 27. 

 " Dec. 2. 



1778, Jan. 19. 

 " Feb. 17. 



Aurora Borealis. 

 Aurora Borealis. 

 Great Aurora Borealis. 

 Aurora Borealis. 

 Aurora Borealis. 

 Aurora Borealis, 



Auroras observed at Ne\r> Haven, Conn., Lat. 41° 18', Long. 72° 55' W. 



46 

 47 

 48 

 49 

 50 

 51 

 62 

 53 



1778, 



Sept. 

 " Sept. 

 " Sept. 

 1780, Mar. 

 " Mar. 

 " June 23. 

 " June 24. 

 " July 9. 



22. 

 24. 

 25. 

 2. 

 30. 



54 



55 



Aurora Borealis. 



Aurora Borealis, 



Aurora Borealis. 



Great Aurora Borealis, 



Aurora Borealis. 



Aurora Borealis. 



Aui'ora Borealis. 



Great A.B. At 10^'^ coruscations five degrees south 

 of zenith, and south of Lyra. At lO:^'' extended from N.W. 

 to between the two stars in head of Draco and the great star 

 in Lyra, Dark cloud under the pole star. Very red in N,E. 

 at 10^ — rest white. At 10'' 18™ a beam arose from the hori- 

 zon at E, 20° S., crossing the meridional coruscations E, and 

 W,, ranged 5° or 6° south of Lyra and south of zenith, two- 

 thirds or thi'ee-fourths across the hemisphere. I judged it 

 reached half way from the zenith to western horizon. At 

 lO*^ 25'" another horizontal or parallel coruscation crossed 

 the Pole star. There were quadrangular fields of crossing 

 beams. There was the greatest variety I ever saAV. 

 July 11. Aurora Borealis. 

 July 27, Aurora Borealis. 



