258 Capt. W. de W. Abney and Mr. G. S. Edwards. 



Table VI. 

 t ^ g ? r \ Gelatine plate. See Fie. 6. 



ocaie 

 number. 



Mean 





Relative 



Reduced 

 to maxi- 

 mum 



01 1UU. 



Ordinate 

 of curve 



Scale. 



sector 

 reading. 



Opacity. 



sensi- 

 tiveness. 



to wave- 

 length 

 scale. 



Exposure. 



Sector 

 reading. 



xJare 













mms. sees. 





glass 



>7Q 

 to 

















>7Q. 



to 



1 



1 



2 



4 





4 



9! 



q 

 o 



/ O2 



02 



11 

 J-t 



O 



25 







25 



3 



11 



0.1 



«2 



0/ 



125 



A 



Of 





2 



12 



A 



DO 



lb 



K 

 O 



17 

 I 



O 



1 30 



15 



AX 



Af»! 



IOI 



±C% 



O 



fix 

 °2 





1 



18! 



O 



00 



22o 



7f 



1U5 



Q 



y 



30 



on 





DO2 



OK 1 



Q 

 O 



11 





15 



42 



O 



ou 



OQ 



Ql 



yf 



13 



1 

 122 



7 



59 



t>2 





9Q1 



Qi 



1 q 

 ±0 





5 





*7 

 1 



OU 





»2 



lo 



1 Q 



lo 



3 



70 



' 2 





Q1 1 



olf 



11 



ID 



ID 







79 



O 

 O 



00 



/II 



I/2 



OA 1 



OQ 

 2iO 







OI 

 °4 



9Q 



ou 



Qf» 

 OU 



41 









ft 1 



Oa 





KA 

 04 



0/2 



029 



01 







Q 



y 





ou^ 



AO 



0/ 



fid 

 OO 







t>2 



X 4 



AO 



fja 

 l& 



100 



1UU 







10 



m 



61| 



69 



96 



96 







10| 



201 



58! 



52 



72 



73 







11 



23 



56 



37 



51 



56 







111 



26 



53 



36 



50 









12 



27 



52 



33| 



46! 



48 







12| 



28 



51 



32 



44! 









13 



31 



48 



26 



36 



38 







13| 



33 



46 



23 



32 









14 



39 



40 



16| 



23 



24 







14| 



44 



35 



13 



18 









15 



52 



27 



8| 



12 



13! 







15! 



59 



20 



6! 



9 









16 



64 



15 



5 



7 



7 







16| 



68| 



10! 



3! 



5 









17 



70 



9 



3 



4 



4 







18 



72| 



6! 



2 



2f 

 1! 



2! 







19 



76 



3 



1 



1! 







