AURORAS OBSERVED AT CAMBRIDGE. 



149 July 11. Bright and active Aurora at 9 h and 



10 h P. M., shooting to the zenith. 



150 " 12. Aurora midst clouds, streamers. 



151 Aug. 10. Aurora, about 3 C high. At ll h 15 m , 



curious appearance of the clouds, stretching 

 from east to west exactly. Aurora bright. 



152 " 29-30. Faint Aurora from 9 h to 10 h P. M. 



153 Dec. 27. Aurora. 



1851. 



Bright Aurora. 



Bright Aurora. 



Aurora. 



Aurora, low 'and diffused. 



154 Feb. 5. 



155 " 18. 



156 Mar. 29. 



157 May 24. 



158 June 5. Strong Northern Lights with stream- 



ers, at 9 h P. M. 



159 " 27. Slight Aurora. 



160 July 26. Strong, irregular Aurora, very 



bright, from 9 h to 10". 



161 Aug. 29. Aurora, low arch, full North, 9 h P.M. 



162 Sept. 4. A brilliant Aurora»with streamers, 



and drifting light, at 2 h A. M. At 2 1 ' 30 m , an 

 arch was formed to the southward, apex E. 

 of S., about 40° high; the flashes on this side 

 resembled what is called " heat lightning." 

 To the N. N. W., and N. E. there was fre- 

 quently rosy and green light. I have not 

 seen a more brilliant display ; the wind was 

 unsteady from the N. 



163 " 6. Auroral arch at evening until ll h 

 apex N. to N. N. E., bright moonlight. 



164 Sept. 7. At 7 h 15 ra P. M. Strong auroral arch 



7°, streamers, and rose-light flashing, &c. 

 until 7 h 21 m . then subsided with occasional 

 streamers and diffused light. At 4 h A. M. of 

 the 7th, Mr. Andrew Wyeth reports a bril- 

 liant Aurora covering the heavens, never I 

 saw the like before 



165 Oct. '-. A fine auroral arch at 9' 1 P. M.. apex 



N. by E., about 12° high, clear bright moon- 

 light, the arch steady, with'long cirro-stratus 

 clouds below. 

 1 ii6 " 20. Fine Aurora commenced at 7 h P. M., 

 during twilight, with a well defined aroh> j 

 its apex a i'ew degrees E. of N., and altitude 

 about 15°. At 7 h , broken rolling billows, va- 

 rying every minute, streamer of white light, 

 very dark below : at 8 b 57 m , a dark cloud be- 

 low fringed above with white light, and above 

 it a regular arch, no streamer ; at 9 h 10 m 30 s , a 

 long narrow streamer at E. N. E. just bisected 

 by At . at 9" 12 m 5 s , it had moved about 



one degree northwardly; this was a singular 

 streamer and well adapted to show parallax, 

 if observed elsewhere N. or S ; at 9 h 18 m 

 short streamers from N. E. to N. W., rising 

 from dark cloud below ; at 9 h 20 m 35 s , a double 

 arch, below steady, the one above has, 

 streamers ; at I2 h , diffused light, dark below 

 apex of arch in the north. 



167 Oct. 23. At evening till midnight, bright 



Aurora. At 6 b 30 m well defined, regular arch ; 

 then very strong light, radiating, fine, like 

 iron at white heat, not streamers, but strong 

 short rays or spikes. 



168 Nov. 15. Low auroral arch, 3° high, apex l c 



or 2° E. of N. Arch continuous and well 

 defined, at 9 h P. M. 



169 Dec. 29. A very bright auroral arch at 6 h , 



5° in width, stretched across the north from 

 N. E. to N. W., highest point about 30°. 

 A smaller one, within this, having an alti- 

 tude at highest point of about 15°, was seen. 

 The space between these appeared quite 

 dark, and also that within the small circle. 



170 " 30. Aurora at 4 h A. M. confined low 

 in the north horizon, diffused sheets of light 

 are continually rushing to the zenith, van- 

 ishing before they reach the altitude of 25°. 



1852. 



171 Jan. 19. Bright Aurora at night. 



172 Feb. 18. Bright Aurora. 



173 " 19. Aurora of extraordinary brilliancy 

 commenced at evening twilight. Between 

 10 h and ll b , corona was in Dec. of Mars, 

 and as nearly as possible in the meridian. 



174 " 20. The Aurora yet visible at 6*, and 

 pretty surely seen after sunrise at 6 h 58 m . 



175 " 26. Evening. Aurora. 



176 April 10. Aurora below the clouds, at 9 h lO™. 



177 May 18. Fine steady auroral arch during 



the evening till midnight. 



178 " 19. Bright and strong Aurora, with 

 considerable activity. 



179 " 20. Aurora bright, with streamers. 



180 " 21. Aurora low and diffused at 10 h . 

 1S1 June 15-16. Aurora, arch, and streamers. 



182 July 5. Aurora, from 9 h to 10 m P. M., inter- 



rupted by cirro-stratus clouds, some stream- 

 ers, to the N. E. red light. 



183 " 6. Slight Aurora, brighter at 10 h . 



184 " 7. Auroral arch. 



185 " 8. Aurora, low and faint. 



186 " 9. Bright Aurora over thunder clouds. 



