— 152 O. N. Rood on Photometric Experiments. 
When the same mirror was used at 5°, i. e., the light being 
reflected from it nearly perpendicularly, the results given below 
were obtained. 
2. 2. 
eres ces thi = ee maror cen aks Reema 
955 ' 1297 5 1298 
958 1304 955 1301 
958 1304 956 1302 
958 1305 957 1303 
960 1305 957 1303 
962 1307 958 1304 
962 1308 958 1305 
963 1310 961 1306 
963 1310 961 1307 
965 1313 962 1308 
965 1313 962 1308 
969 1313 963 1309 
970 1314 963 1310 
971 1314 964 1312 
972 1315 965 1312 
973 1318 967 1313 
977 1318 968 1315 
977 1328 969 1316 
980 sprees 972 —— 
983 18)23596 Sone 18)23532 
983 19) 18272 —— 
_—_—— 1310°8 1307°4 
21)20324 105 961°6 105 
enna 91- pont 
967°8 1205°8 eames 3202°4 
191 1152°6 ; 
1158°8 Result, 91°88 per cent reflected. 
Result, 92°35 per cent reflected. 
due to the shifting of the compensation point during the experi 
ments, and not to any defect _ the screen. 
experiments were made on another mirTo 
a 
bie’s 
an at the same angle 
4458 per cent. 
en’ ror 
rocess, the glass side being used, with the — 
andred rays 78°01 were reflected, the angle © 
2. 
