144 Scientific Intelligence. 
rays before it rises as an ascending current and returns to the 
to the intensity of the sun’s baat: “Tt thus Be eran a very intri- 
cate problem to determine how much the surface of the ground is 
kept below the maximum ag noperae by the heat absorbed by 
= moving air.— ature, Dec. 1 7 
2. Temperature of the Sun. oils F. Roserri, of the Uni- 
versity of Padua, concludes a series of papers entitled —* Experi- 
mental researches: on the temperature of the Sun,” with the fol- 
oo ne STREET 
and if we consider the surrounding temperature during pe obser- 
vations to have been about 24°, giving 6= 297, we obta 
fe 10238° 45 
so that the oo temperature of the sun, represented in degrees 
Centigrade, 
t= 9965°°4, 
if we only take into consideration the absorption produced by the 
terrestrial atmosphere. If we neglected this absorption we should 
have a lower temperature. es short, in the observations made, 
the maximum was -obtained o geese mber 28th at midday: this 
is represented by 210 scale divisions, which gives y the value 
= 5°6921 XK 210 = 1195°3. 
Tf we introduce this value into the formula, we obtain 
T = 8883'8, 
giving 
¢= 8610'8. 
This result will be ied modified if we take into account the 
absorption exercised by the solar atmosphere. According to 
y = 1838°5 X > = 15320°8. 
