South Kensington, 25th September, 1889. 
OF SUNLIGHT THROUGH THE BARTH’S ATMOSPHERE, 37 
cc 
g 
0) 
I> 
C<l 
CO 
o 
.3 
.3 
S 
a 
-4^ 
.3 
*-+3 
o 
a 
-+^ 
rQ 
riil 
OQ 
o 
o 
PL, 
•73 . 
O >> 
■s ^ 
O 0) 
15 *0 
0-- 
'fl 
o 
CO 
CO 
rH 
'r5 
05 a 
Q. 03 
^ a 
9-. 
-4^ Q 
O 
03 
o 
O 
07i 
CO 
CM 
lO 
CM 
CM 
d 
o 
0) 
*03 ^ 
J-l 
a 
C o 
03 
03 ^ 
o 
Ph 
)J3 o 
03 
Equivalent 
in 
intensity. 
00 o 
CO O CO 
iO iO 
01-^0 
rH 
O CX) 
CO (X) 
^ rH CO 
rH cq CO 
1 rJH lO 
j <M rH 01 
Depth of 
tint. 
White 
= -100. 
)0 lO <M 
o do do 
JC^ CM 
>0^0 
00 CO CO 
30 Ip (Cl 
Oi cb rH 
i'^ iO ri? 
00 O r-H 
O O 
iC 
CO CO ib 00 ^ lO 
00 CO 03 00 CO 
Ail- 
thickness, 
that of ZD 
being 1 . 
»o 
rH 
T6-T 
cc 
cL 
cb 
Barometer, 
pressure 
in inches. 
CO 
oi 
' 
03 
a 
o 
o 
o 
CM 
H 
(M 
i-H 
CM 
CO 
cd 
1 n 02 
_A_ _A_ _A_ 
Expo 
sure i 
second 
o o o 
1—1 01 -^1 
o o o 
rH (M ^ 
>0 0 0 
I— 1 CO rifl 
O lO o 
—H rH CO 
o o o o o o 
rH CM r-H OQ 
No. of 
exposure. 
rH Oq CO 
ra IP ^ 
l> 00 05 
O rH (M 
rH rH rH 
CO ^ jlO CO JO 00 
rH rH rH rH rH rH 
