512 Mr. E. S. Johonnott on the Thickness of 



Table IV.— 1: 70 Oleate of Soda Solution. 



1 



1 Age o 



F Films. 



o 



| ) 



si 



U 

 3 . 



.2 



o 



hours. 



mins. 



¥ 



.2f 



32 



•r-H DTI 



go 

 so 



EH 



G3 



Obs. I. — Freely exposed. 







52 



102 



•60 



25-8 







3 



49 



6-35 



•35 



25-8 



K 





7 



48 



645 



•35 







Obs. II. — Sealed partially, 3 hours. 







53 



167 



1-00 



25-2 



b x 





10 



52 



11-9 



•70 



25-3 







55 



51 



6-1 



•35 



26-2 



h 



l 



15 



51 



8-7 



•50 



25-8 



16 6, 



2 



... 



51 



104 



•60 



236 



20 b x 



Obs. III. — Freely exposed at ends. 







53 



167 



1-00 



24-3 



K 





2 



53 



10-8 



•65 



24-6 



16 K 





37 



52 



59 



•35 



26-0 



h~ 



1 



17 



41 



6-5 



•30 



26-6 



j? 



Obs. IV. — Sealed firmly, 10 minutes. 







53 



16-7 



1-00 



24-0 



h 





35 



53 



11-7 



•70 



24-4 



24 



4 



20 



51 



7-0 



•40 



25-6 



46 b 2 



4 



25 



war 



med 









4 



25 



45 



59 



•30 



28-0 



K 



4 



32 



41 



6-5 



•30 



31-0 





Obs. V. — Sealed firmly, 2 days. 







53 



30-0 



1-8 



23-0 



h 





5 



53 



21-7 



1-3 



23-0 





i 



5 



53 



150 



•9 



24-2 





3 



30 



53 



15-0 



•9 



25-1 



» 







bs. VI. — Sealed firmly, 4 days ; low temj 



). 







53 



30-0 



1-80 



180 



&i 



3 





52 



17-0 



1-0 



193 





8 





51 



139 



•8 



21-0 





24 





48 



147 



•8 



19-8 



)> 



Obs. VII. — Sealed 5 days ; high temp. 







53 



150 



•90 



29-8 



h 





2 



53 



100 



•60 



300 



10 b 2 





10 



53 



8-3 



•50 



30-2 



20 b 2 



2 



15 



48 



120 



•65 



30-0 



*.- 



6 



15 40 



l 1 



15-5 



•70 



28'4 



1 



