124 M. R. Bunsen on the Law of Absorption of Gases. 



2. Observations after the Absorption. 



Lower surface of mercury in outer cylinder . « t = 352*2 mm. 



Upper surface of mercury in tube of absorption b x = 350*7 ... 



Upper surface of water in tube .... c x *= 65*5 ... 



Upper surface of water in outer cylinder . d x = 8*0 ... 



Barometric pressure p { = 746*3 ... 



Temperature of tbe absorptiometer . . . •J, = 19°*0 C. 



Temperature of the barometer .... Tj = 18°*9 C. 



Reduction of these Elements. 



1. Before the Absorption. 



Surface of mercury at a — 423*6 



Surface of mercury at 6 = 124*1 



Column of mercury in the absorption-tube . a— b = 299*5 



Ditto reduced to 0° tt = 298*5 



ThebarometricpressureQo = 0*7469)reducedto0° ir x = 744*4 

 The pressure of the gas reduced to 0° . 77-j— 7r = 445*9 

 Tension of vapour of water at 19°*2 to be subtracted = 16*6 



Pressure of the dry nitrogen P = 429*3 



The volume of gas corrected from the calibration^! _ „ , Qft 

 read off at ft= 124* 1 at 19°*2 C ... f ~ *' yU 

 Ditto reduced to 0° V= 32*608 



2. After the Absorption. mm 



Barometric pressure /»i = 746*3 reduced to 0° . 8 = 743*8 



Surface of mercury at «! = 352*2 



Surface of mercury at b x = 350*7 



Column of mercury in tube at 19°*0 C . a l — b l = 1*5 



Ditto at 0°C S,= 1*5 



Lower surface of water in tube at .... b x = 350*7 

 Upper surface of water in tube at . . . . c x = 65*5 

 Column of water in the tube . . = (£>, — Cj)m>= 285*2 

 Lower surface of water in outer cylinder . . . a x = 352*2 

 Upper surface of water in outer cylinder . . d x = 8*0 

 Column of water in the outer cylinder («, — «?,) =: 1^ = 344*2 

 The column of water (w, — w) acting opposite to "1 __ nn.o 



the barometer J " 



Ditto reduced to pressure of mercury ... q= 4*4 

 The pressure reduced to 0°*C . . . (8-S, — g) = 746*8 

 Tension of watery vapour at L9°*0 to be subtracted = 16*3 

 Pressure of the unabsorbed nitrogen . . . P t = 730*5 

 The residual volume of gas corrected from cali-\ _ , ~ ,,- 

 bration read off at division C!=65*5 . . . J~ 



Ditto reduced to 0° V,= 16*522 



The corresponding volume to division #,=350*7 =200*04 

 Volume of absorbing liquid A, = 182*37 



