434 S. P. Langley — Temperature of the Moon. 





Devia- 



Screen 



1 

 „, -r, Moon 01 _ 



Screen 



n B+D 



B+D A+E. 



Time. 



tion. 



A. 



Sky B. q Sky D. 



E. 



C--J-. 



2 2 



Series II 















9 h 08 m 



41 08 30 



215 



213-2 2134 211-9 



210 



0-8 



+ 0-1 





40 20 



228 



233 235-6 2348 



233-8 



1-7 



+ 3-0 





40 



183-8 



183 184-6 181 



180 



2-6 



+ 0-1 





39 40 



183-8 



185 188-2 184-2 



184 



3-6 , 



+ 0-7 





20 



192 



193-5 198-8 196 



197 



4-1 



+ 0-2 





39 



185 



1853 188-4 186 



188 



2-7 



— 0-8 



9 h 20 m 



38 40 



197-7 



196-2 198-3 197-5 



1978 



1-5 



-0-9 





30 



214 



213 2145 212 



212-8 



2-0 



— 0-9 





20 



182-5 



183 183-6 182-4 



184 



0-9 



— 0-6 





10 



185 



184-6 186-7 186-7 



189 



1-0 



-1-0 





38 



191-6 



184 189-2 182-8 



186-2 



5-8 



— 5-5 





37 50 



175 



170 8 180 167 



170-2 



11-1 



-3-7 





40 



167-4 



161 177-2 159-4 



168 



17-0 



-7-5 





30 



171-4 



165 181-8 161-2 



172 



18-7 



-8-6 





20 



171 



166-7 1828 164 



171-7 



17-4 



— 5-9 





10 



173 



169 182 168-8 



176 2 



13-1 



-5-7 





37 



173 



166-5 176 166 



174 



97 



-7-5 





36 



178-2 



174 184 172-8 



1782 



10-6 



—4-8 



9 h 42 m 



35 



183-2 



182 184-3 179-6 



180-6 



3-5 



-1-1 



Temperature of Screen^=\S i 



9 h 45 1 



10 h 00 m 



10 h 20 m 



35 

 36 



37 00 

 10 

 20 

 30 

 40 

 50 



38 00 

 10 

 20 

 30 

 40 



39 00 

 20 

 40 



40 00 

 20 



41 08 30 



190 



191 



1995 



198-2 



189-5 



188-2 



189 



181-4 



173-6 



185 



195 



203 



2097 



206 



210 



200-5 



206-4 



2145 



221-4 



185 



190 



193-8 



190 



181-5 



182-4 



183-5 



176-3 



172-8 



183-7 



195-9 



203-5 



208 



207 



211*4 



201-5 



209-2 



214-7 



222 



186-2 



201-3 



205-5 



203 



197-2 



200-2 



200-5 



188-8 



180-6 



185-8 



198 



205 



208-7 



211-2| 



215 



205 



215 



217 



224-1 



178-2 



181 



46 



-39 



191-8 



197-6 



10-4 



— 3-4 



192-2 



200-9 



12-5 



-7-2 



1868 



195 



14-6 



-8-2 



178 



187-1 



17-5 



-8-6 



180 



189-5 



19-0 



-7-9 



178 



182 



19-4 



-4-4 



175-4 



176 



12-8 



-2-7 



175-9 



1S1 



6-3 



— 3-0 



185 



188 



1-4 



— 2-1 



197-8 



199-7 



1-2 



— 0-6 



201 



201 



2-8 



+ 0-2 



206 



205-8 



1-7 



-0-7 



207-4 



209 



4-0 



-0-3 



210-5 



210-5 



4-0 



4-0-7 



201 



202-3 



3-7 



-o-i 



211-6 



211-6 



4-8 



+ 1-2 



214 



215 



2-7 



-0-4 



223-2 



223 



1-5 



+ 0-4 



of this night may serve as 

 They all show two maxima 



a type of a 

 (see column 



The observations 

 great many others. 



C ) whose apparent position differs little from that al- 

 ready given in the example, and it may be added that in all 

 cases the radically different character of the heat in these two 

 maxima bears the proof of the independent test furnished by 

 passing the rays through glass before measurement, the rays 

 from the upper maximum passing freely, as rays belonging to 

 the maximum of solar reflected heat should do — those in the 

 lower maximum, on the contrary, being absolutely cut off by 



