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



its centre passing over Aldebaran and midway between Castor 

 and Pollux. Presently short streamers began to depend from 

 its lower edge, like a row of fringe, sloping as if with a tendency 

 to converge to the coronal point. At 9 h 20 m waves began to 

 move along it from E. to W., and at 9 h 25 m it looked like a 

 wavy river of light flowing rapidly from E. to W., exactly between 

 Castor and Pollux. By 9 h 40 m it had disappeared, having moved 

 considerably to southward. Between 9 h 15 m and 9 h 45 m the 

 aurora in the N.N.W. remained nearly unaltered, the upper part 

 hazy, the lower arched and well-defined, enclosing a clear space, 

 the apex of which was immediately under Arided, and in the 

 course of the 30 minutes did not vary its position more than a 

 degree (which it moved upwards). Wind all the time high from 

 S.W. The only clouds were cirrostrati, tending from a W.N.W. 

 to E.S.E. direction. 



" Feb. 20, a.m. Cloudy, cirrostrati and nimbi under cirri and 

 cirrocumuli, wind S.W. with a little rain. 8 h 30 m p.m. Clear, 

 aurora in N.N.W. similar to last night, top of clear space within 

 arch just upon Arided, upper part of aurora hazy, a few orange 

 and crimson streamers. 10 h 15 m . The same, arch similar to that 

 of last night, stretching across the sky and occupying nearly the 

 same position, passing between Castor and Pollux. It had been 

 seen for some time before this, but soon after disappeared, moving 

 slowly to S. as it grew fainter. Part of the W. limb remained 

 visible for some time after. No appearance of the waves noticed 

 last night. ll h 30 m . Diffused aurora in N.N.W., without 

 streamers ; sky clear, except some cirrostrati immediately under 

 the aurora. 



"1850. Jan. 29, 12 h p.m. Cirrocumulus bands moving slowly 

 from about W.N.W. Their length was about ten times their 

 breadth, and at right angles to the direction of their motion. There 

 were thirteen distinct and nearly equal bands, quite parallel and 

 separated by clear spaces of uniform width. 



"Aug. 8, 10 b to 12 h p.m. A very interesting display of elec- 

 trical clouds. Along the east and west horizon, and extending 

 upwards on each side more than 45°, were bands and patches of 

 dark cirrostrati passing into nimbi and heavy cumuli. Above 

 these clouds was a very distinct luminous haze. The clouds had 

 a decided linear arrangement from N.N.W. to S.S.E. The sky 

 near the zenith was sometimes quite clear, then a thin dark haze 

 would come over it, small dark amorphous patches of cloud would 

 form, expand, unite with other masses, and again fade away all 

 in a few minutes. At one time a very well marked narrow 

 cirrostratus band extended from S.S.E. through the zenith to 

 N.N.W. It was a little twisted, having been formed of amor- 

 phous masses united polarly. This also soon disappeared. An 



