Barometrie Observations. 315 
green, and the dark gravel of some roads appeared of a blackish 
blood colour. Men’s faces and dresses were all changed in the 
same manner, so that people looked at each other with astonish- 
ment and awe. The colours were all of the finest tint and shade, 
very rich and mellow. I could not conceive any thing like 
them, except the brightest prismatic colours viewed through a 
glass slightly smoked, so as to give them a mellowness without 
destroying their brilliancy. On the surface of all objects there 
was observed a gentle undulatory motion, which had a very sur- 
prising effect. This I found was occasioned by the clouds, which, 
though they seemed to the naked eye perfectly still, yet, when 
viewed through a telescope, appeared to oscillate something after 
the manner of the aurora borealis, without changing their rela- 
tive positions. : 
This darkness continued until two o’clock, and to such a de- 
gree as that scarcely any person could read or write within doors 
without approaching close to the windows. 
A little after two, there was observed a gentle motion of the 
clouds from the south-west ; they moved almost impereptibly to 
the north and east, and about three the darkness was dispelled ; 
cocks began to crow, and swallows to fly about, as if it had been 
early in the morning. 
I have not yet learned how far this darkness extended.—I 
am, &e. Ears 
BAROMETRIC OBSERVATIONS. 
To Dr. Tilloch. 
Howland-street, Oct. 12, 1821. 
Srr,—Of the four monthly sets of Dr. W. Burney’s Barometric 
Observations, which he mentions in p. 238, as having been sent 
to me, the two last have already been correctly printed in pages 
155 and 237: the other two sets are as follows, viz. 
Barometrical Observations at Gosport, June 11th, 1821, un- 
der all the circumstances of Thermometer, Hygrometer, Winds 
and Clouds, which are mentioned in p. 75. _ 
Hours 8 9 10 11 12 
Inches 29-97 29:99 30:01 30-01 30-04. 
Barometrical Observations at Gosport, July 9th, as above, p. 76. 
Hours 8 9 10 Ll 12 
Inches 30:24 30:25 30:26 30:26 30:25. 
I am your obedient servant, 
Joun Farzy Sen. 
Rr2 Obser. 
