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



" September 11, 8 h a.m. Cirri passing into cirrocumuli extend- 

 ing in broad fleecy bands from S.S.W. to N.N.E. These were 

 crossed at right angles by fine, straight, parallel fibres, and also 

 by parallel undulating bars ranging W.N.W. to E.S.E. The 

 bars were short and arranged in fasciculi, a considerable number 

 being included in each bundle. The motion of the whole was 

 pretty brisk from S.S/W., or at right angles to the direction of 

 the fibres and bars. 



" September 25. (During the day some very curious irregu- 

 larities had been observed with regard to the upper clouds.) 

 ll h 30 m p.m. Aurora flashing up to the coronal point with extra- 

 ordinary rapidity. A bank of cirrostrati remained motionless 

 along the horizon from W. by N. to E., extending upwards a 

 few degrees. The corona was well-defined, and luminous sheets 

 undulated up to it from the horizon with great rapidity. The 

 length of the undulations lay nearly W. to E., convex towards the 

 corona and concave towards the horizon. Two arches then 

 formed, the apex of one bearing W.N.W., and that of the other 

 N.N.E. ; the latter was the brighter, and sent a constant undu- 

 lating stream up to the corona. The cirrostrati next began to 

 move to eastward, and with them the whole apparatus of the aurora, 

 which had a very striking effect, the bright luminosity of the 

 aurora contrasting strangely with the deep black of the cirro- 

 strati, on which it seemed to sail majestically onward. 12 h p.m. 

 Sky overcast, a broad dark cirrostratus band stretching from W. 

 to E., with patches of the same form of cloud scattered over the 

 sky. Auroral luminosity with faint sheets and streamers in 

 N.N.E. In W.N.W., a few degrees above the horizon, was a 

 fixed auroral luminosity. The cirrostrati in several parts of the 

 sky, especially in N. W., adorned with luminous fringes or tufts. 

 Light airs from W. Next morning the sky was covered by cirri 

 ranging N. to S. — N.B. A notable 'magnetic storm' accom- 

 panied this auroral display. 



" November 5, 2 h p.m. Fleecy cirri moving briskly from about 

 N.W., under current from S.E., driving before it masses of 

 cumulostrati. 10 h p.m. Hazy aurora in N.N.W., cirrostrati 

 moving briskly from S.W. Aurora affected by undulatory pul- 

 sations from the horizon to the zenith, which appeared to influ- 

 ence the movements of the cirrostrati, which were fitful and 

 disturbed. These clouds were in some instances streaky, but 

 generally amorphous. There were one or two faint streamers in 

 N.N.W., from which point some luminous streaks extended, 

 becoming fainter and narrower towards the south, without any 

 appearance of coronal convergence. 



" November 11, p.m. Cirri irregular, twisted, and passing into 

 cirrocumuli, moving very rapidly from "W. 10 p.m. Clear and 



