Extra Meteorological Observations, March 20 — April 14, 1845. 283 



ADDITIONAL METEOROLOGICAL NOTES. 



L846. 



d. h. m. 



ir. 20 16 4. Milky-like cirri radiating from N. ; if cirri, they are of the very thinnest kind, the sky only 

 appearing milky here and there. IT"* 4™. Cirri radiating from N by W. ; sky milky. 17"^ 20™. 

 Altitude of crepuscular arch 30° ; reddish vapours to E. 18''. Sky pinkish to ESE., blood- 

 red to E., deep purple to ENE ; cirri radiating from NNW. 19'^. Cirri radiating as before. 

 20** 30™. Parhelia seen. The western parhelion very bright. 

 ir. 26 10 — 11''. Several flashes of lightning seen ; wind blowing strongly at 12'' 10™; at 12'' 15™, wind blow- 

 ing 6-0 lbs. ; heavy rain. 14''. Sky milky ; the moon projects the shadow of the clouds in 

 the air; traces of aurora. 17^ 4™. Crepuscular arch about 8° altitude. 17'' 45™. Begin- 

 ning to colour on the E. horizon. 18'' 20™. a Lyrse seen quite distinctly with the naked eye. 

 a. 28 12 25. A shooting-star to WNW., altitude about 45°, moving from S. to N. 



17 7. Crepuscular arch about 10° altitude. 35™. Sky colouring to E. 

 IT. 29 The sky seems very milky near the sun ; this has generally been observed when the difference of 



the dry and wet bulb thenmometers was considerable, as to-day ; the mixture of vapour with 

 the air rendering it more transparent. At 1 1''. Sky milky and hazy-like near horizon ; faint 

 aurora. 

 J. 30 17 10. Crepuscular arch, 9° altitude. 

 I. 31 3 Patches of cumulo-stratus to N. ; woolly and mottled cirri from W by N. ; linear and curled cirri 



from W. ; cirri radiating from NW by W. ; portion of a halo. 4''. Fine mottled, linear, and 

 cymoid cirri ; cirro-strati radiating from NW by N. and SW by S. ; halo brighter than before. 

 5''. A long string of scud, loose cumuli, and cumulo-strati extends from Cheviot to N., 

 moving from SSW. ; masses of cirro-strati ; mottled and woolly cirri and cirrous haze. The 

 cirro-strati are in rounded cake-like pieces one above another ; sky altogether stormy-like. 

 5h 20™. The cirro-strati to E. have regular serrated i-idges. 6''. Patches of a halo. 7''. 

 Clouds pinkish or slightly claret-coloured to W. 

 r. 31 18 50 — 19 15. Parhelia seen ; they were at no time very bright ; the distance of each from the sun, from 

 several measurements, was 22 J° ; they were sometimes elongated horizontally, and sometimes 

 vertically. The parhelia were coloured red on the side nearest the sun, and greenish-yellow 

 on the opposite side ; the clouds in which they were produced were dense cirro-strati and cir- 

 rous haze. In the zenith woolly cirri, having a slightly cirro-cumulous disposition. 21'' 15™. 

 Top of a halo seen. 22''. The cirro-stratus is composed of various kinds of cirri ; patches of 

 loose cumuli or cirro-stratous scud to N. 



Ia: 1 17 10. Bright crepuscular arch, altitude 11° ; an arch of reddish vapour 5° altitude. 18'' 5™. a Lyra' 

 seen through cirri with the naked eye. Sky nearly covered with cirri, radiating from ESE. 

 and WNW., coloured orange, red, and yellow ; deep-red vapours to E. 



4r. 2 6 Cirri dispersed irregularly over the sky, radiating to some extent from WNW. ; hazy on horizon . 



7''. Flame-like cirri; atmosphere very hazy to E. ; Cheviot invisible. 13'' 5™. Shooting- 

 star to E., altitude 30°, moving slowly towards E by S., magnitude 1 to 2. 



At. 5 7 Finely-mottled cirri to W., altitude 20°, which shew colours exactly like diffraction spectra from 



irregularly- striated bodies ; deep purple vapours to W. ; thick to E. ; Cheviot invisible. 



i" r. 8 6 Passing showers ; clouds falling in cirrous curtains as if bent by the wind ; there must be snow in 



the upper strata, as the rainbow is seen at the extremities only, and the sun is shining on the 

 whole. 8^. Sky of a slate-blue to E. 10'' 15™. Sky very clear ; stars of the third magnitude 

 seen within a degree of the horizon ; a dark speck of cloud appears about 15° above NW., it 

 rapidly increases, is very thin at first, gradually becomes denser, extending itself ; in 5'" it 

 covers two-tenths of the sky, extending from NW. to SE, ; throughout it has been surrounded 

 by sky ; in about 10™ it becomes much thinner ; stars of the second magnitude being visible 

 through it in many places, and is again rapidly disappearing but without any motion. Streaks 

 I of cirro-strati to NNW., quite stationary. Zodiacal light very distinct. 



Mr. 13 16 25. Sky overcast with a thick hazy-like cloud; rain commenced. 18'' 5'" — 15™. A long strip of 

 light to E by N. vertically above the sun, like the sun reflected from rippled water ; the strip 

 is slightly broken, like a series of not very regular repetitions of the sun's image ; the cirri in 

 which these images are formed radiate from NNW. 



M. 14 7 Cirri radiating from NNW. and SSE., but moving from N. ; ill-defined portion of a solar halo. 



8^. Cirro-strati blood-red from NWby W. to W., seen in fiery patches through the gray scud; 

 sky yellowish to N. 9''. Clouds now radiating from N by E. 



