LIQUIDS AND ALLIED EXPERIMENTS. 



79 



Table 37. — Air-air through K»S0 4 solution (8.7 grams in 100 grams water). Single- 

 tube vessel. J/= 8.6430 grams; 0=31.046; ,^ = 2.470; p w = 1.065 at 23°; float, 

 2r = 3.o3 cm.; vessel, 2r = 4-7 cm. 



Date. 



Barom- 

 eter. 



t 



H 



Do 



Date. 



Barom- 

 eter. 



t 



H 



l'o 



Nov. 8 



• 75-07 





 24.0 



70.90 



3.960 



Nov. 20. . 



75-97 







17-5 



65.07 



3.707 



9 



• 75-55 



19.0 



69.49 



3 



941 



21 . . 



76.31 



17 



3 



64.84 



3 



697 



1 1 



• 7<5.33 



19.0 



68.39 



3 



879 



22. . 



75-94 



'7 



4 



64.74 



3 



690 



12 



■ 75-85 



19.0 



67.96 



3 



854 



23. . 



76.08 



17 



5 



64.65 



3 



683 



13 



. 76.17 



19.0 



67.64 



3 



83b 



25.. 



74.91 



«7 



3 



64-55 



3 



680 



M 



• 7569 



19.0 



67-37 



3 



821 



26.. 



76.20 



17 



3 



64.22 



3 



661 



•5 



• 75-72 



19.0 



66.94 



3 



796 



27.. 



76.38 



17 



1 



63.92 





646 



16 



• 76.52 



.8.7 



66. 57 



3 



779 



29.. 



76.95 



16 



6 



63-34 



3 



619 



18 



76.26 



18.0 



65.77 



3 



741 



30. . 



: 76- 79 



16 



6 



62.74 



3 



584 



'9 



. 76.29 



17.7 



65.44 



3.726 











3'S 



c/lbv. 8 























5* 











8 / 



3 



/ 



i It 



3 'i 



S 



./ 



46 







B 



IT 22 27 



Fig. 32 a, B. — Chart showing loss of standard volumes of gas in diver in lapse of day. 

 Diffusion of air through K2SO4 solution. 



The final diffusions are given by 



z> = 0.0120 c.c./day or io 10 k = 0.388 



Both data for k, strangely enough, correspond to a decrease of the original 



rates for a concentrated solution. As in many other cases to be exemplified, 



the effect of dilution is thus of a complicated nature, seeing that the pores of 



a dilute solution may be smaller than those of a more concentrated solution. 



Table 38. — Air-air through K 2 SOj solution (4.2 grams in ioo grams water). Single- 

 tube vessel. Constants as in table 37. p w = 1.0315 at 19 . 



Date. 



Dec. 2 



3 



4 

 5 

 6 



7 

 9 

 10 

 1 1 

 12 



Barom- 

 eter. 



76.60 



76.45 

 76.30 

 77.06 



75-75 

 76.14 

 76.28 



76.33 

 75.92 

 76. 16 



H 





v 



69.23 



4 



188 



68.95 



4 



171 



68.90 



4 



165 



68.74 



4 



152 



68.86 



4 



154 



68.85 



4 



149 



68.90 



4 



152 



68.72 



4 



141 



68.48 



4 



130 



68.16 



4 



109 



Date. 



Barom- 

 eter. 



Dec. 13 



14 

 16 



'7 



18 



19 

 20 

 21 

 23 



77.10 



76.74 

 75.40 



76.45 

 76.40 



74-34 

 75.88 

 76.57 

 76.75 



// 



68.00 

 67.74 

 67.32 

 67.07 

 66.66 

 66.78 

 66.66 

 66.45 

 65-85 



Vo 



4.104 

 4.090 

 4.065 

 4.048 

 4.023 

 4.029 

 4.022 

 4.007 

 3-974 



58. The Same, Continued. — On further dilution with about an equal 

 volume of water the density was 1.0136 at 20 , corresponding to 1.7 grams 

 in 100 grams of solution, or 1.7 grams in 100 grams of water. The vapor 

 pressure was tt' — tt (1—0.003). 



