Effect of the Spectrum on the Haloid Salts of Silver. 253 



Table I. 



AgBr. (Collodion plate.) See Fig. 1 (p. 269). 



Scale 

 number. 



Mean 





Relative 



Reduced 

 to maxi- 

 mum 

 of 100. 



Ordinate 

 of curve 



Scale. 



sector 

 reading. 



Opacity. 



sensi- 

 tiveness. 







to wave- 

 length 

 scale. 



Exposure. 



Sector 

 reading. 



Bare 

















mins. sees. 





glass 



79 















8 



75 



4 



2 



1 



of 



5 



5 



8! 



56 



23 



16 



8 





4 



5! 



8| 



34^ 



44! 



42 



21 





3 



9 



9 



25 



"54 



63 



32 



33 



2 



13 





15 



64 



104 



53 





1 30 



19 



9! 



12 



67 



140 



71 



• • 



1 



26 



10 



81 



70! 



188 



96 



92 



30 



43! 



10! 



8 



71 



197 



100 









lOf 











100 



15 



59! 



11 



8 



71 



197 



100 



99 







11* 



8! 



71 



192 



98 



97 



7 



66! 



12 



10 



69 



165 



85 



87 







12! 



11 



68 



150 



76 









13 



12! 



66! 



134 



67 



68 









Id 







do 









131 











43 







14 



20 



59 



80 



41 









14£ 



24 



55 



73 



37 









14| 

 14f 



28 



51 



55 



28 









32! 



46! 



45 



23 









15 



37 



42 



39 



20 



20 







15* 



42 



37 



32 



16 









15| 



47 



32 



26 



13 









15f 



51 



28 



21 



11 









16 



55 



24 



17 



9 



9 







16| 



61 



18 



12 



6 









17 



65 



14 



8 



4 



4 









70 



9 



4 



2 









18 



73 



6 



3 



1! 



1! 







18| 



74! 



4! 



2 



1 









19 



76 



3 



1 



0! 



1 







H is 13-8 ; G is 10'9 ; Li is 9. 



