780 Mr. J. Sutterly on the Absorption of 



The following are the results : — 



(1) Dec. 20, 1907. Duration of exposure 2 hrs. 

 Air-stream = *5 litre per inin. 

 Tube A, nH = '3'] 



„ B, Wl (H + 1.03E)= 27-0 ,, ».(H + l-98B)-nH = 267 = w _ 



„ C, » a (H + E) = 20-0 J A 



(2) Jan. 21, 1008. Duration of exposure 80 min. 



Air-stream ='5 litre per min. 

 Tube A, nH = -3 . 



.. B, » l( H + 1.93E)= 13-6 .-. ^ H + " 8 , B) 7* = 1» 8 = 1-4+ 



/uII + Lj — nil irl 



„ 0, n,(H+E) = 9-4 J 



From (1) and (2) it follows that with the given solutions, 

 «, r?j, Wg are not equal. Weaker solutions were now tried. 

 The strong solution was mixed with two-thirds of the weak 

 and new solutions were made up, one twice as strong as the 

 other. ( all them 2Ej and E 1( 



(3) July 22, 1908. Duration of exposure 2| hrs. 



Air-stream = *5 litre per min. 

 Tube A, «H r= *7-\ 



■ «. •****> = -1 ■■ -::: , ,s i ;:::::::- , " l> 



„ C, n^H+EJ = 10-7J 



Again made new solutions : one-third of E, was taken for 

 the new weak solution and two-thirds of E, for the new strong 



solution. 



(4) July 31, 1008. Duration of exposure 2{ hrs. 



Air-slream = '5 jitre per min. 



TubeC, 7,U = -3! 



„ A, n^H+JEJ = 2-8 J 



(5) Aug. 5. Same solution^ used. Duration of exposure 2$ hrs. 



Air-stream = '5 litre per min. 



Tube A, «H - -41 



C W (H4^F) 6-1 • ^ ^ + f^)^ ^_4-7_ 



„ B, ^(H+iEJ = 2-8 J 



r lhe results of Experiments (4) and (5) show that for 

 solutions < f the strengths used and for the other experiment;,! 



= 1-4. 



lo-u 



