28 
CAPTAIN W. DE W. ABNEY ON THE TRANSMISSION 
Oi 
oo 
ci 
G 
c 3 
■Tj 
C 
(M 
s' 
s 
nd 
G 
• i-H 
G 
O 
> 
o 
w 
a 
OJ 
a 
a 
OQ 
’290. 
Ph 
o 
nd 
o 
o 
£:/) 
i| 
(• * 
M 
^^4 
o 
OQ 
Calculated 
intensity. 
19-3 
10-7 
6-2 
Adopted 
mean 
intensity 
for 10 sec. 
exposui-e. 
»P C<l 
di Gi 
rH rH 
Intensity 
for 10 sec. 
exposure. 
' CO Cp TO itp ^ CO r-H 
OOOlOO OrGOrHrH (O (O 
OX Ox rH 1 —i rH r-i rH rH rH 
Equivalent 
in 
intensity. 
1 1 
; 
rjH O 00 05 CO rfl 00 CO CO COCO 
CO CO CO 50 rH COCD 00 !>. 
Depth of 
tint. 
White 
= •100. 
I>- lO 01 CO 
Oll>io6o GOO 
I^^CC^ CO'^ 
Air 
thickness, 
that of ZD 
being 1. 
rH <0 
^ lb 
Barometer, 
px’essure 
in inches. 
cb 
Ol 
Cl 
a 
LH 
)0 
'dH 
rH 
CO 
■ rS 
G Cl a 
o 
r> o 50 O 
rH CO CO 
o lo o o 
r-< CO ^ CO 
qn 
o 
6 
1^ 
o 
d 
an 
O 
PH 
W 
0 ) 
ic^co^ iO'X'iN.ooai 
CM 
