Fireball Radiant in Sextans. 
[November, 
640 
At some point farther south the temperature would have 
shown the full — 1*666°+( — 1*235°) = -2*897°. And there 
must be between the two stations of observations a line 
oscillating with seasons and years, where the two tides from 
north and south meet, the higher one overlapping, and the 
former passing with a temperature — 1'666° below the other 
with a maximum cold of —2*897°. 
This will produce north of the line of meeting by the 
mixing of the waters, by the thinning out of the southern 
and the thickening of the northern tide, by the more eager 
absorption of vapours by the more salted northern waters 
(salt being precipitated from the upper colder layer), by the 
motions of the different salts (with regard to which I must 
refer to the volume quoted), by the fridtion and contadt of 
the two tides, we may say the — 1*666°+( — 0*435) = 2*08° in 
the upper layer and the — 1*666° — (— 0*435°) in the sublayer, 
observed once as an extreme case of the rule of temperature 
between the two layers by Captain Nares (see quotations 
from page 116 and page 115, as before). 
HERE is a prominent meteor shower from the N.W. 
limit of the small constellation Sextans (Hevelius), 
the place of the astronomical radiant point being at 
about a 145° 5 + 6°, which is some 8° S.W. of a Leonis and 
15° N.N.E. of « Hydras. The display is a remarkable one 
for two reasons, — namely, its apparent persistency, and for 
the immense fireballs which it occasionally yields from about 
the end of January to the middle of March, and probably 
On February 13th, 1871, 9 h. 4 m., I observed a large 
fireball which in point of size and brilliancy rivalled' the 
full moon. It traversed the southern part of Orion, disap- 
pearing at 62j°— 15°, where it projedted a vivid streak for 
ten minutes. This meteor was also seen at Rugby, where 
the recorded path was very similar to that descried at 
II. FIREBALL RADIANT IN SEXTANS. 
By W. F. Denning, F.R.A.S. 
later. 
