﻿Characteristic Curve of a Photographic Emulsion. 365 



mental curves in fig. 9, corresponding to known relative 

 intensities, and in the third column the values of: A are 



Table IV. 

 Cross-section of (a) =0'98yu, 2 , 

 (6) = 1-75 M 2 , 

 (c)=2-73/, 



(<0-8-9V- 





X 



(curve 



values) . 





A. 





Relative 

 Intensity. 



































1-000 



(a). 



(ft). 



(«). 



(d). 



(a). 



(b). 



(')■ 



(<*)■ 



91-5 



95-8 



97-5 



98-0 



2-45 



3-16 



3-70 



391 



0-689 



900 



94-5 



96-8 



97-8 



2-30 



2-91 



3-45 



3-80 



0-490 



87-0 



93-0 



96-0 



97-0 



2-04 



2-66 



3-22 



3-51 



0270 



75-0 



87-6 



92-5 



94-5 



1-39 



2-08 



2-60 



2-90 



0-128 



460 



73-0 



81-0 



88-5 



0-62 



1-31 



1-66 



2-16 



0-06 I 



5-2 



52-5 



66-6 



78-0 



0-05 



0-74 



1-10 



1-51 



0-033 



00 



36-0 



54-0 



67-6 



o-oo 



0-45 



0-78 



1-12 



0016 



00 



20-7 



40-5 



570 



o-oo 



022 



0-52 



0-84 



0-008 



o-o 



70 



28-5 



46-5 



o-oo 



0-07 



0-33 



0-62 



Fig. 10. 



T 

 A* 





s / 







// 



/ / 



^^T 



^^^r 





t 

















0-25 



0-50 



075 



X- 



1-0 



calculated. The A, I curves for the four sizes of grains are 



given in fig. 10. 

 © © 



