26 



THE DIFFUSION OF GASES THROUGH 



The experiment of this section is the converse of those briefly detailed in 



table 2 and repeated at greater length in a following paragraph (23). The 



data are given in table 5 and are shown graphically in fig. 8. During the 



Table 5. — Diffusion of air through water into hydrogen. M= 14.45; £ = 981; Pm= '3-6; 

 i? a = 2.87Xio 6 ; = 6.4 cm. 2 ; A = Mgp m /R a = 0.067 17; h r —l.^cm.; h"=iocm.; ft" =5 

 cm.; 1 /p0 = 0.3486.* 



Date. 



Hour. 



Barom- 

 eter. 



II 



t 



WXI0 6 i 



Date. 



Hour. 



Barom- 

 eter. 



// 



t 



mxio 8 





ft. 



7». 















ft. 



»t. 













Mar. 6 



5 



OO 



76- 37 



53-59 



21 .4 



8002 



Apr. 12 



3 



30 



77-52 



61.18 



.7.8 



9239 



7 



4 



OO 



77-25 



57.21 



22.6 



8510 



'3 



4 



00 



77 



36 



60.79 



19.3 



9137 



8 



4 



OO 



76 



60 



61.98 



24.8 



9>59 



14 



3 



45 



76 



26 



60. 12 



18.0 



9074 



9 



4 



OO 



76 



02 



64.81 



22.8 



9636 



15 



3 



00 



75 



81 



59.85 



20. 1 



8972 



10 



4 



15 



74 



59 



65.70 



18.8 



9890 1 



16 



3 



30 



75 



25 



58.87 



19.2 



8851 



1 1 



4 



OO 



70 



38 



66.84 



19.0 



10055 



17 



3 



30 



75 



45 



57.10 



18.0 



8618 



12 



4 



OO 



75 



87 



67.23 



17. 1 



10176 



18 



4 



00 



75 



67 



55-74 



18.6 



8396 



>3 



4 



OO 



76 



73 



68.36 



19.2 



10277 



19 



4 



OO 



75 



69 



54.62 



17.0 



8271 



14 



4 



15 



76 



59 



68.36 



'7-4 



10336 



20 



3 



45 



75 



10 



53-52 



16.3 



8121 



>5 



4 



OO 



74 



44 



69.79 



20.4 



10453 



21 



4 



OO 



75 



50 



52-52 



16.8 



7957 



16 



4 



OO 



75 



44 



68.26 



13. 1 



10467 



22 



4 



OO 



76 



14 



51 . 10 



17.0 



7737 



«7 



3 



30 



76 



64 



68.73 



17. 1 



10402 



23 



4 



OO 



76 



37 



49.52 



16.2 



7517 



18 



4 



15 



75 



80 



70.03 



22.8 



104 10 



24 



4 



OO 



76 



02 



49.13 



'7-5 



7426 



19 



4 



OO 



76 



04 



69.96 



22.4 



10413 



25 



4 



OO 



76 



26 



48.19 



18.6 



7259 



20 



3 



30 



74 



5' 



70-55 



23.6 



10462 



26 



3 



30 



76 



82 



47.16 



18.4 



7108 



21 



3 



45 



75 



57 



70.07 



20.5 



10491 



27 



3 



15 



76 



88 



46.47 



20.0 



6970 



22 



3 



30 



74 



61 



70.13 



21 .0 



10483 



28 



3 



15 



76 



33 



46. 16 



21 .0 



6902 



23 



3 



30 



75 



46 



69.43 



19.1 



10442 



29 



4 



OO 



75 



77 



45-43 



21.2 



6788 



24 



3 



30 



76 



54 



68.54 



18.0 



10343 



30 



4 



OO 



75 



58 



44.12 



20.0 



6617 



25 



3 



45 



77 



02 



68.40 



17.8 



10328 



]Mav 1 



3 



45 



75 



02 



43.66 



20.5 



6537 



26 



4 



30 



76 



54 



69.49 



21. S 



10361 



2 



4 



OO 



74 



9i 



43-34 



20.2 



6496 



27 



3 



45 



75 



07 



69.74 



21 .9 



10397 



3 



4 



OO 



75 



7i 



42-77 



19.2 



6430 



28 



3 



45 



74 



59 



70.08 



22.6 



10424 



4 



4 



15 



76 



14 



42.48 



19.2 



6387 



29 



4 



OO 



74 



83 



69.87 



22.5 



10397 



5 



4 



OO 



76 



35 



42. 12 



18.3 



6351 



30 



4 



OO 



73 



77 



69.60 



21.5 



10388 



6 



4 



OO 



76 



48 



41.88 



19.0 



6301 



3> 



4 



OO 



74 



58 



68.87 



20.0 



10328 



7 



4 



3° 



76 



06 



41-54 



19.2 



6246 



Apr. 1 



3 



30 



75 



37 



67.76 



20.0 



10226 



8 



4 



OO 



75 



93 



39.58 20.5 



5926 



2 



5 



OO 



75 



■97 



66.59 



16. 1 



IOI I I 



9 



4 



OO 



74 



95 



38.02 21.3 



5679 



3 



3 



30 



76 



•7' 



66.08 



17.0 



10003 



10 



4 



OO 



75 



32 



37-77 



21.5 



5638 



4 



4 



OO 



77 



.07 



65.63 



16.8 



9897 



1 1 



4 



OO 



75 



69 



37.89 



22.0 



5648 



5 



4 



OO 



75 



•27 



65-35 



17.2 



9889 



12 



4 



OO 



75 



90 



38.09 



21.8 



5680 



6 



3 



45 



75 



.31 



65.83 



20.0 



9871 



13 



4 



30 



75 



92 



37-97 



22.3 



5654 



7 



3 



OO 



75 



•47 



65.76 



20.2 



9855 



'4 



4 



30 



76 



.81 



3756 



20.6 



5623 



8 



4 



30 



76 



•43 



64.70 



18.3 



9754 



•5 



4 



OO 



76 



14 



37.29 



20.5 



5583 



9 



4 



30 



76 



.28 



63-53 



"7-5 



9603 



16 



4 



OO 



75 



■74 



37.11 



22.2 



5528 



10 



4 



OO 



76 



.86 



63.21 



19.6 



949' 



17 



4 



OO 



75 



•93 



37-27 



22.2 



5552 



11 



3 



30 



77-25 



62.32 



19-5 



9360 

















*Cf. §24. 



first days and later the swimmer rapidly increases in weight, at least at first; 

 the influx of hydrogen or the initial apparent rate is about 



m = 0.000550 g/day = 64 X io~ 10 g/sec. 

 and it thus much exceeds the converse case of table 2 ; but this rapid influx 

 is soon reduced in the lapse of time. 



The bubble phenomenon, due to the diffusion of hydrogen into micro- 

 scopic air-bubbles adhering to solid parts, under water, was equally promi- 

 nent. During the early days these gathered in great quantity and had to 

 be shaken off. It would be interesting to estimate the virtual pressure at 



