252 
SIR J. COXROT OX THE AMOUNT OF LIGHT REFLECTED 
Table II. 
Crown Glass. 6’5 mm. plate, x = 2 mm. 
A. 
1 Eeadings. 
Half 
differences. 
a — X. 
b. 
Percentage of 
light transmitted. 
Percentage of 
light transmitted, 
i^lean of A and B 
1 cm. 
cm. 
977-J06-1 
4-2 
197-6 
206-2 
91-84 
97-1-106-.3 
4-6 
197-2 
206-6 
91-11 
967-105-4 
4-3 
197-5 
206-3 
91-65 
1 
91-53 
1 
B. 
94-7-103-4 
4-3 
197-5 
206-3 
91-65 
95-1-104-0 
4-4 
197-4 
206-4 
91-47 
95-1-104-1 
4-5 
197-3 
206-5 
91-29 
91-47 
91-50 
Crown Glass. 11'5 mm. plate, x — A mm. 
A. 
Eeadings. 
Half 
differences. 
a — a\ 
h. 
Percentage of 
light transmitted. 
Percentage of 
light transmitted. 
Mean of A and B. 
cm. 
cm. 
96-2-106-3 
5-0 
196-6 
207-0 
90-20 
96-3-106-4 
5-0 
196-6 
207-0 
90-20 
96 3-106-4 
5-0 
196-6 
207-0 
90-20 
96-4-106-5 
5-0 
I96-6 
207-0 
90-20 
90-20 
B. 
94-1-104-9 
5-4 
196-2 
207-4 
89-49 
94-4-104-6 
5-1 
196-5 
207-1 
90-02 
94-4-105-1 
5-3 
196-3 
207-3 
89-67 
95-3-104-9 
4-8 
196-8 
206-8 
90-56 
89-93 
o 
o 
