AURORAS OBSERVED AT CAMBRIDGE. 



264 Apr. 



265 " 

 266 



267 



7. Aurora. 

 " 9. Aurora in the evening. 

 " 12. Fine auroral arch, apex 5°, broke 

 into streamers at 10 h P. M., dark below, clear. 

 " 14. Auroral strainers, faint, without arch, 

 at 9 h P. M. 



268 Sept. 10. Bright Aurora, between wane clouds, 



near the horizon. 



269 " 17. Slight Aurora. 



270 Oct. 9. Aurora. 



271 Nov. 29. Aurora, from 6 h to 8 h P. M. 



1856. 



272 Mar. 30. Low diffused Aurora, at 9 h P. M. 



273 Apr. 22. A bright Aurora at 9 h P. M., double 



arch at 9 h 2" 1 , P. M., the exterior of the up- 

 per limb just touched a Cephei and a Lyra*. 



Aug. 22. Bright Aurora, 3° high, some stream- 

 ers, at 9 h P. M. 



" 31. A rare exhibition of auroral light at 

 10 h P. M. First, a regular arch of light, 

 faint and the apex 20° high. Below this arch, 

 broken masses of light, in form resembling cir^- 

 ro-stratus clouds, without streamers, the light 

 steady, or changing its form slowly. One 

 would suppose them to be cirro-stratus clouds, 

 but that the stars Capella etc. shone with 

 undiminished splendor though them. 



Oct. 4. Bright Northern Lights, streamers, 

 broken arch 5°. 



Nov. 20. Aurora low at 11" P. M., none at 7 h , 

 and 9 h . 



274 



275 



276 



277 



1857. 



278 Feb. 26. At evening, Aurora for the first time, 



height of apex 4°, arched. 



279 Sept. 7. Aurora in the evening, low arch 3°. 



280 " 8. Aurora low, at evening. 



281 " 10. Bright Aurora, streamers rising from 

 a bank of cirro-stratus clouds. 



282 ,Nov. 9. Aurora, low and diffused. 



283 " 17. Aurora, 



284 Dec. 18. Patches of Aurora forming and 



solving rapidly. 



285 " 20. Bright Aurora in the evening. 



1858. 



Jan. 8. Bright Aurora, active. 

 " 12. Some traces of Aurora at evening. 

 Feb. 16. Aurora very bright and active, 8 h . 

 289 Mar. 13. Aurora at evening, irregular arch, 

 dark below. 



292 " 14. 



293 " 15. 



294 May 7. 



at 9 h P. 



295 July 1. 



296 " 5. 



297 Aug. 30. 

 "298 " 31. 



300 



290 April 10. Active Aurora, apex 10°, dark in- 



tervening clouds, at 9 h P. M. 



291 " 11. Aurora at night. 

 Diffused Aurora, at 9 h P. M. 

 Evening, Aurora diffused. 

 Strong Aurora between the clouds, 



M. 

 Aurora at 9 h P. M., radiating. 

 Aurora low. 



Aurora bright, in the evening. 

 A bright Aurora, a strong beam of 

 light from 9 h to 10 u , N. N. E. 

 299 Sept. 1. Low auroral arch, about 5°, no 

 streamers. 



" 7. Bright auroral arch, apex having 

 altitude of 10°, somewhat diffused, with short 

 streamers, dark cirro-stratus clouds below. 

 Low diffused auroral light. 

 A faint trace of Aurora, at 9 h P. M. 

 Bright but low auroral arch. 

 Auroral aVch, low. 

 Aurora, low and bright. 

 At evening, Aurora, in clouds. 

 Auroral arch, faded before 1 h P. M,, 

 altitude about 15°, well defined. 



Aurora, eveniug, cir. stratus below. 

 Aurora low and diffused, with clouds. 

 Brilliant Aurora, noble arch. No co- 

 rona, streamers of deep red, at 8 h P. M. 



Aurora, diffused, bright all evening.. 

 Traces of Aurora at evening. 

 Slight Aurora. 

 Faint Aurora at evening. 

 Auroral streamers, at 8 h P. M. 



1859. 



316 Feb. 22. Fine Aurora, deeply rose tinted, 



soon disappeared and the sky clouded over. 



317 " 23. Slight Aurora. 



318 Apr. 29. Bright Aurora, the arches being 



perfectly formed, streamers and flashes of 



lit beyond the zenith. Lasted till late. 



y 28. Bright Aurora in the evening. 



;i ;. 28. Fine Aurora, perfect arch at the 



south, with rose-colored streamers at the east 



321 " 29. The telegraph worked by the Aurora 

 this evening, o'i the line between Boston and 

 Portland, for two hours, with a power e< 



to 75 or 100 of Grove's cups. 



322 Sept. 2. Am-ora of an exquisite rose color a 



A. M.. in the east and south. At 9 h 1'. ' 



