72 



1845. 



Mar. 27 



28 



29 



30 



31 



April 1 



2 



3 



4 



5 



6 



9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 May 1 

 2 

 3 

 4 

 5 



Herrick''s Auroral Heglster. 



Hazy, No A.B. to 10^'\ but a faint display w'd not have been vis. 



Very hazy. Polaris faintly vis. : no A.B. seen to lO*^ : obs. imperf. 



Ov't. Obs. impos. to 11^, and doubtless all night. 



Clear. No A.B. to 10^ 



Ov't. Obs. impos. to lO^-'', and doubtless all night. 



Clear. No A.B. to 10'\ " 



Very clear. No A.B. to lO*'. 



Mostly clear. No A.B. to 10''. Almost wholly ov't at lO'', 



Clear. No A.B. to \Q\^. 



Ov't. Obs. impos. to lO'', and doubtless all night. 



Clear. No A.B. to 9f\ 



Ov't. Obs. impos. to 10'', and doubtless all night. 



Ov't. Obs. impos. to ll*", and probably all night. [seen to 10'', 



Considerably clouded and becoming more so: obs. poor: no A.B. 



Mostly clear. No A.B. to 10''. Moon begins to interfere. 



Clear. Moon interferes. No A.B. seen to 10''. 



Clear ; some cirrous streaks and bands : moon : no A.B. seen to 10''. 



Hazy about horizon : violent westerly Avind.* (239) 



Clear, but somewhat hazy about hor. : moon : no A.B. seen to 10^''. 



Haze and thin cl'y sheets : moon: no A.B, seen to 10'' : obs. imperf. 



Ov't and rainy. Obs. impos, to 104^'', and doubtless all night. 



Ov't. Obs. impos. to 11'', and doubtless all night, 



Obs. impos. to 10'', and doubtless all night. 



Obs. impos. to 10'', and all night. Rain during night. 



some rain, Obs. impos. to 9'', and doubtless all night. 



Obs. impos to 10'' at least. Mostly clear at sunrise of 22d, 

 Moon. No A.B. to 9f'^. [no A.B. seen. 



Much clouded : moon : obs. scarcely pos. to 9^'', and prob. all night : 

 Ov't. Obs. impos. to 9^'', and probably all night. 

 Ov't. Obs. impos. to 9'', and doubtless all night. 

 Ov't to 9'', and doubtless all night. 



Ov't to 10".* (240) 



Ov't. Obs. impos. to 10'', and probably most of the night. 

 Clear. No A,B, to 10'', 



Cloudy early part of evening.* (241) 



Almost wholly ov't.* 

 Clear. No A.B. to iP. 



Mostly ov't to 10^''. Obs, nearly or quite impos. 

 Ov't; some rain. Obs, impos. to 10'', and prob. most of the night. 

 Mostly ov't to 9". At ll^" considerably ov't.* (242) 



Ov't. 

 Ov't. 

 Ov't ; 

 Ov't. 

 Clear. 



April 13th. — A fine display of the A.B. visible probably all night. At 7h 30m moon shining, 

 and 45m before end of twilight I detected an auroral arch, obscure yet well formed, embracing^ 

 about 100° horizontal extent, and about 8° liigh at vertex. I soon saw in and above it here and 

 there red stains and imperfect streamers. Watched till 9h; wind uncomfortably strong. The 

 phenomenon was constantly changing — arch breaking up, brightening in spots, fading, reap- 

 pearing, &c. About 8h a segment of an arch, 43°± alt. and 30° long. I saw but few streamers. 

 After midnight (about 2h?) I looked and found a bright light low in N., and no streamers. I 

 learn that between 9h 30m and lOh 30m there were many streamers, some 60° alt., and also waves. 



April 37th. — Between lOh and llli clouds broke away and revealed a bright A.B. There was 

 then a broad arch spanning 90°, more or less, and about 10° high at vertex; much diffuse light 

 about arch, but I saw no streamers. Much obscured by clouds. Did not observe it more than 

 five minutes. 



April 30th. — At 9h found the sky partly clear and a display of the A.B. ; horizontal extent 

 70<* more or less ; sundry streamers, highest 40° ; not clearly defined. General light up to 

 lOh 30in at least. 



May 1st. — Through crevices in the clouds appeared some unusual light ; perhaps slight A.B. 

 Observation nearly impossible to lOh 15m, and probably all night. 



May 5th. — About 13h clear, and no A.B. Between 3h and 3h a. m. (6th) a bright A.B.— lumin- 

 ous arch, but no streamers seen. Fide Professor E. T. Fitch. 



