326.  Aftronomy 
“At their fecond meeting, on the ves a paper: by: the 
Rev. Mr. ‘Vince on an unufual atmofpherical refraction was’ 
read. —One day laft fummer, direéting his telefcope to» the 
fea, he obferved part of the maft of a cutter (the hull being 
below the horizon), and above it an inverted image of the 
cutter, above which appeared a dire&t image of the fame : 
thefe two images were joined at their hulls; but the point 
of the matt of the inverted i image appeared to be as far above 
the top of the real maft as_ this laft was above the horizon. 
Thefe images appeared and difappeared very fuddenly, fome= 
thing like the beams of the aurora borealis, beginning a 
little above the real objeét, and darting upwards.—The 
learned author, after fuppofing thefe appearances to be occa- 
fioned by atmofpheric ftrata of different denfjties, recom- 
mends it to philofophers to inveftigate this fubjeét; and 
fuggefls the utility of ftationing men provided with telefcopes 
at certain places on the coaft; as by this means he thinks 
velfels and other objeéts might be fometimes difcovered 
long before they would otherwife become vifible. 
On the.gad a paper, by the Abbé Mann, was read, ‘the 
fubftance of which was to fhew, that after havi ing travelled 
feveral tines over Germany he found very few remains of 
voleanos. ‘There was very little interefting matter in’ this 
paper, w hich concluded with an account off ome remarkable 
hail-ftorms, 3 in which flones, or pieces of ice, from half an 
inch diameter to eight pounds weight had fullen. 
“MISCELLANEOUS. 
ASTRONOMY AND GEOGRAPHY. 
The aftronomer Beauchamp, well known by his travels int 
the eat, and formerly grand vicar of Babylon, has rendered 
2 confiderable fervice to geugraphy by his new map of ‘the © 
Black Sea; the exact pofition of which he has determined 
from aftronomical obfervations. » In the year 1981 this ac: 
tive aflronomer went to Bagdad, where he built an obferva- 
tory. ‘In 3787 he determi hed the pofition of. the fouthern 
tr extremity 
