LIQUIDS AND ALLIED EXPERIMENTS. 



77 



Table 34. — Air-air through BaCl^ solution (20.5 grams in 100 grams water). Single- 

 tube vessel. AI=j.4g6o grams; 6^=26.926; pg = 2.4-jo; p,y=i.i70 at 23°; float, 

 2r = 3.oocm.; vessel, 2r = 4.7 cm. 



2«_ 



e/lTov.S 



Jlfai 25 



Fig. 30 A, B. — Chart showing loss of standard volumes of gas in diver in lapse of days. 



Diffusion of air through BaCl-i solution. 



54. The Same, Continued. — The solution was now diluted one-half and 

 tested in the same vessel. The density was p^= 1.0886 at 21°, implying 

 about 9.6 grams in 100 grams of solution or 10.6 grams in 100 grams of 

 water. This corresponds to the vapor pressure tt' = 7r(i —0.050). Table 35 

 and fig. 30 B record the results obtained, which are fairly regular, except at 

 the beginning, where the conditions of equilibrium are being slowly 

 approached. The mean constants are 



t'o = 0.0082 c.c./day or 10 *''k- = 0.225 



a slight increase on the preceding values, showing that the effect of dilution 

 as usual is at first not marked. 



Table 35. — Air-air through BaCU solution (10.6 grams in 100 grams water). Single 

 tube vessel. Constants as in table 34. Pm= 1.0886 at 21°. 



Date. 



Nov. 25 

 26 



27 



29 



30 



Dec. 2 



3 



4 



5 



6 



7 



Barom- 

 eter. 



74.91 

 76.20 

 76.38 

 76-95 

 76.79 

 76.60 



76.45 

 76.30 

 77.06 



75-75 

 76.14 



Date. 



Dec. 



9 

 10 

 1 1 

 12 

 J3 

 '4 

 16 



>7 



18 



19 

 20 



Barom- 

 eter. 



76.28 



76.33 

 75-92 

 76.16 

 77.10 



76-74 

 75.40 



76-45 

 76.40 



74-34 



75.88 



17 

 17 



17 

 17 

 •7 

 >7 

 17 

 '7 

 '7 

 17 

 17 



H 



64.51 

 64.27 

 64. 12 

 63-93 



63 -57 

 63.27 

 62.93 

 62.77 

 62.51 

 62.36 

 62.22 



Vo 



3.066 



3-054 

 3.049 



3-039 

 3.025 

 3.013 

 2.996 

 2.988 

 2.975 

 2.967 

 2.960 



