28 Mr. W. Stevenson mi the Aurora, and the connexion which 



kept distinctly separate to near the S.S.E. point. The light was 

 strongest between the dark rays in N.N.W., but was very distinct 

 throughout the whole extent of the bands. The absence of 

 moonlight rendered the phenomenon much more striking and 

 unequivocal. >jj nj 



" March 14, 10 h p.m. A splendid display of luminous cirri 

 or cirrostrati ? From the N.N.W. point proceeded dark lines or 

 bands, which extended across the sky and appeared to converge 

 to the S.S.E. point. These were apparently at a much inferior 

 altitude than that of true cirri. They sometimes appeared to 

 shoot suddenly over a large arc of the sky. Between them a 

 very distinct luminosity was apparent, which from the N.N.W. 

 point, up to nearly 45°, equalled in brightness that of an ordinary 

 aurora ; it was, however, very decided even to the S.S.E. point, 

 but no alteration was observable at the ordinary point of appa- 

 rent convergence of auroral beams (or that to which the dipping- 

 needle points). The air was still, with the exception of a few 

 light puffs from W.S. W. Occasionally black streaks appeared 

 to shoot from the N.N.W. point, contrasting very strongly with 

 the luminous ground on which they seemed projected, and then 

 as suddenly became so faintly marked as to be almost impercep- 

 tible. The light emitted by this phenomenon was very con- 

 siderable, and exactly resembled the pale greenish light of phos- 

 phorescent substances. 



"April 20, 7 h p.m. Cirri moving from about N. or N.N.W., 

 direction of the bands W.S.W. to E.N.E., or at right angles to 

 that of their motion. The electric state of the atmosphere has 

 evidently been disturbed for some days. 



"June 6, ll h a.m. Cirri and cirrocumuli moving rapidly 

 from N.N.W. The cirrous fibres very distinct, ranging W. to 

 E., or nearly at right angles to the line of motion. At l h 30 m 

 p.m., the wind being brisk from N.W., the cirri presented a 

 curious appearance, some of the bands ranging N.N.W. to S.S.E., 

 crossed by others from W. to E., and passing downwards into 

 cirrocumuli. The changes of form of the cirri at this time were 

 very rapid. 



"July 18, l h P.M. Cirri exhibiting a most beautiful dendri- 

 form appearance, resembling the fantastic figures seen on glass 

 during frost. 



" July 30, 12 h p.m. Cirrostrati affected by luminous pulsa- 

 tions. 



"August 6, 10 h 30 m p.m. A very instructive exhibition of 

 cirrostrati in connexion with the aurora. A dense mass of 

 straw-yellow light formed an arch with its apex about 30° above 

 the N.N.W. point, hazy and ill-defined, and partly hid by some 

 cirrostrati, showing quite black upon the luminous ground and 



