LIOUIDS AND ALLIED EXPERIMENTS. 



Table 37. — Air-air through KsSO^ solution (8.7 grams in 100 grams water). Single- 

 tube vessel. .V=8.6430 grams; C=3i.o46; Pff = 2.47o; Pu,= i.o6^ at 23°; float, 

 2r = 3.03 cm.; vessel, 2r = 4.7 cm. 



3-8 

 U 



Jkv. 8 





J 



15 18 Zi 28 



^. 



B 



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 



i'o = 0.0120 c.c./day or 10^^ = 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. 



T.\BLE 38. — Air-air through K;SOi solution (4.2 grams in 100 grams water). Single- 

 tube vessel. Constants as in table 37. Pa)=i03i5 at 19°. 



Date. 



Barom- 

 eter. 



Dec. 



Date. 



Barom- 

 eter. 



t 



H 



Dec. 13 



•4 

 16 



17 

 18 



'9 

 20 

 21 

 23 



77.10 

 76.74 

 75.40 



76.45 

 76.40 



74.34 

 75.88 



76.57 

 76.75 



17 

 17 

 «7 

 •7 

 "7 



n 

 17 

 17 



•7 



68, 



67. 

 67, 

 67, 

 66. 

 66, 

 66, 

 66, 

 65 



00 



74 

 32 



07 

 66 



78 

 66 



45 

 85 



ro 



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 7r' = 7r (1—0.003). 



