36 Mr. W. Stevenson on the Aurora, and the connexion which 



the S.S.E. point. 9 h 15 m . Auroral light in N.N.W. with a few 

 streamers. 9 h 20 m . A few luminous clouds scattered along the 

 zone formerly occupied by the arch. 9 h 25 m . These clouds more 

 numerous, small, and ranging with their major axes N.W. to S.E. 

 9 h 30 m . The arch re-formed by the union of these, and occupy- 

 ing a position nearly midway between those it formerly held. Its 

 * width was now less regular, varying from 1° to 4°. It formed 

 a curious flexure between Lyra and Cygnus, the concave side 

 facing the north. It moved gradually south till its apex bore 

 65° above S.S.E. The eastern limb now began to break up and 

 disappear, leaving several luminous clouds to mark its course. 

 The western limb remained for several minutes longer. At 9 h 55 m 

 a streak extended from the W.S.W. point up to a Ophiuchi, being 

 the only auroral appearance visible, the aurora in N.N.W. (which 

 was always most distinctly separated from the arches above de- 

 scribed) having disappeared about 9 h 30 m . The sky was clear 

 during the display. The wind (?) made a singular, continuous, 

 rushing sound, although the trees did not seem to be affected 

 proportionally. Next day the sky was covered by cirri and cirro- 

 cumuli, with compact cirri in N.W. 



u Dec. 3, 7 h p.m. During a very active auroral display the 

 luminous sheets ' proceeded chiefly from S.W., from which point 

 a fitful breeze was blowing, the auroral flashes seeming to keep 

 time with the gusts? 



"1846. Jan. 21, 8 h p.m. A cirrostratus streak suddenly 

 appeared faintly luminous on the west side, and stretching across 

 the sky from about N.W. to S.E. ; in a few minutes the sky was 

 completely obscured by hazy cirrostrati. Air calm, barometer 

 very low. 



"Sept. 11, 9 h a.m. Cumuli moving from S.W., and above 

 them fleecy cumuli moving from about N.W. A mass of com- 

 pact cirri in N.W. in the form of an irregular arch extending 

 upwards to about 45°. Below this the cumuli assumed more of 

 the cirrostratus and nimbus form. Light gusty breezes from W. 

 2 h p.m. Fleecy cirri passing into cirrocumuli, moving briskly 

 from N.W. An irregular mass of pale compact cirri in N.W., 

 under which were cumuli as before. 9 h p.m. Auroral light in 

 N.N.W., with a few streamers and cirrostrati. Shortly before 

 10 11 p.m. a luminous arch was seen by some persons, but it soon 

 disappeared. It was described as extending upwards from W. 

 ll h p.m. A luminous haze (cirrous or auroral ?) over most of the 

 sky, through which the stars were dimly visible. 



"Oct. 19. During an auroral display a collection of cirrostrati 

 continued for a long time scrupulously within the limits of the 

 auroral luminosity, being arched in the same manner and occu- 

 pying nearly the same extent of sky. 



