270 
SIR J. CONROY ON THE AMOUNT OF LIGHT REFLECTED 
Table XI. 
Flint Glass. 
.T,. 
{x - a-i.) 
(,r - X 2 .) 
Per cent, of 
incident light 
reflected. 
February 28,1888.—RepoHslied 
1.54-6 
96-3 
71-2 
179-7 
- 6-09 
with rouge and putty 
153-4 
97-5 
70-8 
180-1 
6-24 
152-9 
98-0 
70-5 
180-4 
6-27 
Mean 
6-20 
March 3, 1888, 5 p.m. — Rc- 
156-7 
94-2 
73-6 
177-3 
6-23 
1 polished by ]\tr. Hiloer. 
157-4 
93-5 
73-0 
177-9 
5-94 
157-4 
93-5 
73-8 
177-1 
6-13 
1 
157-1 
93-8 
73-6 
177-3 
6-14 
Mean 
6-11 
March 3, 1888, 9 p.m. 
156-1 
94-8 
71-6 
179-3 
5-88 
1.55-4 
95-5 
71-5 
179-4 
6-00 
i 
155-4 
95-5 
71-6 
179-3 
6-02 
1 
155-2 
95-7 
72-1 
178-8 
6-17 
Mean 
6-02 
June 5, 1888. 
159-9 
91-0 
74-1 
176-8 
5-69 
159-9 
91-0 
74-7 
176-2 
5-82 
160-2 
90-7 
74-9 
176-0 
5-82 
160-4 
90-5 
73-6 
177-3 
5-51 
Mean’ 
5-71 
June 7, 1888. 
160-2 
90-7 
75-7 
175-2 
5-98 
160-8 
90-1 
74-4 
176-5 
5-58 
i 
160-6 
90-3 
75-3 
175-6 
5-81 
i 
159-7 
91-2 
75-3 
176-6 
6-00 
1 
1 
Mean 
5-84 
June 11, 1888 .... 
160-5 
90-4 
74-0 
176-9 
5-55 
1 
160-5 
90-4 
74-3 
176-6 
5-61 
160-5 
90-4 
74-6 
176-3 
5-68 
161-0 
89-9 
74-6 
176-3 
5-58 
1 
i 
Mean 
5-60 
Jiine 11, 1888.—Repolished 
166-0 
84-9 
81-5 
169-4 
6-05 
with rouge 
165-7 
85-2 
82-5 
168-4 
6-34 
165-8 
85-1 
82-6 
168-3 
6-35 
^lean 
6-25 
.lune 13, 1888 . 
160-1 
90-8 
74-5 
176-4 
5-74 
160-4 
90-5 
74-4 
176-5 
5-66 
160-5 
90-4 
75-1 
175-8 
5-79 
^lean 
5-73 
