478 Scientific Intelligence. 
the position of the thermometers within. The observations on 
the afternoon of May 2, when the air was almost perfectly still, 
show higher intensities than the corresponding times on other 
days, but the observations are ge 2 wei to indicate how muc 
the results are influenced by this 
(3) The intensities by the saute ‘thermometers seem also to 
be iti’ by the varying influence of convection, but in this case 
(and in the preceding also) direct experiments would give more 
Mbbiniation as to this effect than examination of these observa- 
ions. 
(4) The ie by Violle’s bulbs (see the war eh are smaller 
in the morning and greater in the afternoon than those by the 
conjugate thermometers. There is a marked ‘ifferenee in the 
time of the maximum readings, the Violle bulbs fea | the 
maximum one hour later than the conjugate thermometers. This 
shows that the former are sluggish in their sieht, and at any 
given time show the intensity not for that time but for e 
as opinebags as the observations permit for the period April 28 
t 
from curve. It is pr 
uncertainty of several hundredths, but not as great as a tenth. 
ey may be accepted as the final values of the relative solar 
intensity obtained at Caroline a Expressed in terms of the 
12°00 value they are as follow 
Relative solar intensity at Caroline Island, April 28, to May 3, 1883. 
Time. Intensity. Time. Intensity. Time. Intensity. 
ene | §; 
7.00 0°47 10.30 0°94 2.00 0°93 
7,30 0°57 11.00 0:97 0 0-90 
8.00 0°66 11,30 0°99 3.00 7 
8.30 73 12.00 1°00 3.30 0°82 
9.00 0°80 P. M. 4.00 0-76 
9.30 0°87 12.30 1-00 4.30 0°66 
10.00 0°91 1.00 0-78 5.00 0°46 
1.30 0-96 
From the observed solar intensities was calculated the value of 
the “ pe constant” as defined by Professor William Ferrel in 
his investigation of the theory of the conjugate thermometers 
namely, the amount of heat received on a square centimeter of 
in 
A= 2°'360. 
