Effect of the Spectrum on the Haloid Salts of Silver. 255 



Table III. 



Ag 2 BrI. (Gelatine plate.) See Fig. 3. 



number. 



Mean 





Relative 



of 100. 



Ordinate 

 of curve 



Scale. 



sector 

 reading. 



Opacity. 



sensi- 

 tiveness. 



to wave- 

 length 

 scale. 



-KiXposure. 



Sector 

 reading. 



.Bare 

 glass 



7^ 

 / u 











mms. sees. 





xo 



7^ 



/ l» 



o 



o 







6 



17 



l£>2 



fiQ 



o 



3 



O a 



02 



u 



xo 



1 A. 



XHJ 



oo 



x / 



/ 



Q 

 O 



Q 

 O 



O 



xo 





44 



31 



16 



19 



19 







18 



xo 



lb 



OO 2 





98 



oo 



00 



2 



19 



] lof 





Aft 



48 



O 1 



0/ 



if 



21 



xo 



24 



51 







/ o 



1 



25 



16| 

 17 



23 



52 



71 



84 



84 



30 



35 



22 



55 



77 



91 



91 



15 



46 



18 



21 



54 



85 



100 



100 



10 



51 



19 



21 



54 



85 



100 



100 



5 



64£ 



20 



22 



53 



77 



91 



91 







21 



25 



50 



60 



71 



71 







22 



28 



47 



48 



57 



57 







23 



30| 



44^ 



40 



47 



47 







24 



34 



41 



31 



37 



37 







25 



38 



37 



24 



28 



28 







26 



42 



33 



18 



21 



21 







27 



47 



28 



13 



15 



15 







28 



52 



23 



10 



12 



12 







29 



60 



15 



6 



7 



7 







291 



62 



13 



5£ 



61 



61 







30 



65| 



n 



4 



4f 



4| 







30^ 



67 



8 



3| 



4 



4 







31 



70 



5 



2 



** 



a* 







31| 



71 



4 



11 



If 



if 







32 



72| 



2 



1 



1 



1 







V0L. XLYI1. 



U 



