Observations of 500 Nebula. 



117 









Coincidence 









Remarks on the images and state of 





Date 



CD 









oq 





of 



Temp. (J. 











O 



Microm. 









the atmosphere 









r 













4/ V -S 



lWnvpVi 9Q 

 1*1 rl 1 c n V 









2,0 



l . . 



Slight aurora; hoarfrost. 



293 



March 30 



I 



34,980 (6) 





1,9 



2 



Sky illuminated by a very strong aurora. 



294 



April 1 



I 



34,983 (6) 



+ 



1,8 



1.2 



No visible trace of aurora, sky however very light 

 Stars strongly scintillating. 



-o o o 



<\nvil 3 

 j. i. IJ 1 1 1 o 





Q ,1 ADO (| 1)1 



+ 



0,5 



1 O 



Slight aurora. Atmospheric state on the whole not 

 unfavourable: images however a little dull and 

 very unsteady. 



296 



April 18 



1 



34,982 (4) 



+ 



6,6 



2.3 



Twilight; aurora. Unsteady and dull images. 



297 



April 19 



I 



34,982 (15) 



+ 



7,0 



1.2 



Twilight and aurora. Images pretty fine, though un- 

 steady. 















298 



April 20 



I 



34,980 (6) 



+ 



9,9 



1.2 



Twilight; moon; aurora. 



299 



April 21 





34,981 03) 



+ 11,0 



1.2 



Twilight; strong aurora. Images extremely unsteady. 



300 



April 24 



I 



34,981 (4) 



+ 



5,6 



2 



Twilight; slight aurora, but sky relatively dark; 

 windy. Images extremely tremulous. 



oU I 



April 27 







+ 



4,2 



4, 



Iwihght; windy; no traces of aurora — variable. 





April 29 





O A fifiA 



o4,UbU W 



+ 



3,0 



1 o 

 1.2 



Strong twilight; very damp. Observation interrupted 















by fog. 



303 



April 30 





34,982 (4) 



+ 



3,9 



1.2 



Steady and fine images, but sky too light from twilight. 



304 



May 2 



j 





+ 



5,4 



1.2 



Strong twilight; windy; clouding. 



305 



July 30 



l 



35,034 (4) 



+ 16,3 



1 



Images a little diffused and unsteady. 



306 



Aug. 6 



j 



35,221 (3) 



+ 17,4 



1.2 



Damp, though tolerably windy. Images unsteady. 



307 



Aug. 8 



j 



34,998 (12) 



+ 15,5 



2 



Very damp; clouds here and there. 





lew 1 















308 



Jan. 24 



I 



34,992 (6) 





9,4 



3 



Windy. 



309 



March 9 



II 



34,992 (4) 



+ 



2,8 



2 



Strong gale. Observations ill according. 



310 



March 17 



II 



34,989 (4) 





1,6 



1.2 



Sky very light from aurora. 



311 



March 23 



11 



34,992 (4) 



+ 



4,3 



2.3 



Aurora; cirrhi; clouding. 



312 



March 24 



jj 



34,997 (4) 



+ 



3,5 



2.3 



Sky very light from aurora; misty; windy. 



3 1 3 



March 25 





OA not; ( X\ 



34,995 W 



+ 



4,5 





V i f U V 1 f T 1 



No traces ot aurora, sky however very light, lole- 















rably strong gale and atmosphere very dry. 

 Images excessively tremulous and diffused. 



314 



March 26 





34,994 (4) 



+ 



4,5 



1.2 



Images singularly unsteady, boon clouding. 



q 1 1 



April / 







+ 



2,6 



3 



Observation throncli cloiiffc 



316 



April 8 





34,995 (4) 





0,7 



2 



Between cirrhi sky exquisite. 



317 



Apr. 13 





34,993 (4) 



+ 



0,6 



2 



Sky very light from strong aurora; windy. Observa- 











tion partially disturbed by passing clouds. 



318 



Apr. 14 





34,996 (4) 





1,0 



2 



Splendid aurora: misty. 



319 



Apr. 18 





34,996 (4) 





1,4 



2.3 



Sky extremely light from splendid aurora. 



320 



Apr. 19 





34,995 (4) 



+ 



2,4 



3 



Clouding. 



