r 54-8 3 
valido flante vento a fetemptrione ; craffique vapores 
afcendere vifi funt e fluvio portuque vicino. 
In thermometro domini de Reaumur, fequentes 
mutationes obfervatas fuere. 
7 h 20 Spiritus vini 12° & dimidium altitudinis 
fupra terminum congelationis aquas obtinebat. 
ft 
8 
12 
• 
• * - 
0 
13 
8 
3 ° 
• 
•• 9 
I2 f 
8 
43 
» 
• • 
12 % 
8 
ft 
• 
9 
• 
I I# 
9 
3 ° 
• 
9 
• 
•• 
12 
10 
0 
• 
• 9 • 
* 
I 2f 
10 
40 
• 
• 
• 
• 
i 3 i 
LXXIII. An Account of fome ajlro7io?nical 
Obfervatio?7s taken at Lifbon by M. John 
Chevalier in the Yeariys^, By James 
Short, M A. and F. R. S. 
Read March 14/ | ^HIS gentleman mentions two cmer- 
* 754 ' fions of the fatellites of Jupiter, 
*uiz. one of the firft, and another of the third, both 
obferved, in a very clear air, with a Gregorian te- 
lefcope fix feet long. Dr. Bevis, from a great num- 
ber of obfervations, has computed formula of tables for 
the times of the immerfions and emerfions of the firft 
fatellite of Jupiter, and which times we have feldom 
found to differ from the obfervations above 10": By 
com- 
