LIQUIDS AND ALLIED EXPERIMENTS. 



29 



after (curve, c to d) the steady efflux begins, the behavior being at first very- 

 irregular, as usual for oxygen. The rate here, so far as observed, is 



— w = 32Xio -6 g/day or 3.7X10 -10 g/sec. 



The constants of flotation, etc., are 



//'=I4.5 cm. 



Hence 



dp 



2)1'" = 1^.6 cm. 



/ = 28.i cm., 



= 7.05 cm. 



dl 



= 505 dynes/cm. 



k= 1.04X10" 



K = O.jSXiO" 



which is somewhat less than the rate found above for air into air with the 

 same apparatus. What is diffusing, however, must be a mixture of oxygen 



Table 6. — Diffusion of oxygen through water into hydrogen and vice versa. M= 12.01 

 grams; i?„ = 2.6oXio 6 ; p m = 13.6; ^4 =0.0617; h'—i.i cm.; k"= 14.5cm.; A'" = 6.8 cm.; 

 i/p ff =o.3486;*/ = 28.i cm.; areas 14.5 cm. 2 ; = 7.05 cm. 2 , a' = j. 45 cm. 2 ; correction = 

 0.08 cm. Hg. 



Date. | Hour. 



Barom- 

 eter. 



H 



* 



OTXIO 6 



Date. 



Hour. 



Barom- 

 eter. 



H 



t 



TWXIO 6 





h. 



ra. 















A. 



»». 













Apr. 14 



5 



00 



76.26 



72.17 i 8. 2 



9999 



May 12 



4 



00 



75.90 



58.03 



21.7 



7953 



151 3 



00 



75 



81 



66 



69 



20.3 



9179 



•3 



4 



30 



75 



92 



58 



■7 



22.2 



7960 



16 3 



30 



75 



25 



65 



89 



19.0 



9107 



'4 



4 



30 



76 



81 



57 



75 



20.6 



7942 



17 3 



30 



75 



45 



65 



66 



17.6 



9115 



15 



4 



00 



76 



"4 



57 



25 



20. 5 



7893 



18 4 



00 



75 



67 



65 



64 



18.5 



9086 



16 



4 



00 



75 



74 



57 



47 



22. 1 



7867 



>9 4 



00 



75 



69 65 



57 



16.8 



9124 



>7 



4 



00 



75 



93 



57 



65 



22. 1 



7892 



20 3 



45 



75 



10 65 



65 



16.2 9154 



18 



4 



00 



75 



32 



57 



53 



21.3 



7894 



21 



4 



00 



75 



50 165 



68 1 1 6 . 5 9 1 50 



19 



4 



00 



75 



86 



57 



5' 



21.9 7878 



22 



4 



00 



76 



14 I65 



30 



16.8 | 9088 



20 



4 



00 



76 



08 



57 



37 



22.8 7836 



23 



4 



00 



76 



37 



64 



55 



16.0 



9007 



21 



4 



30 



76 



09 



57 



00 



22.0 7805 



24 



4 



00 



76 



02 



"4 



49 



17.2 



8964 



22 



4 



00 



75 



82 



56 



95 



22.5 7786 



25 



4 



00 



76 



26 



(>4 



91 



18.4 



8987 



23 



4 



00 



76 



40 



57 



08 



23.2 7787 



26 3 



30 



76 



82 



<>4 



80 



18.2 



8978 



24 



4 



00 



76 



1 1 



56 



99 



22.8 



7784 



27 3 



15 



76 



88 



'•4 



92 



20.0 



8945 



25 



4 



00 



75 



69 



57 



13 



23.6 



777' 



28 3 



'5 



76 



33 



65 



35 



21 .0 



8976 



26 



4 



00 



75 



96 



56 



67 



23 -3 



7730 



29 4 



00 



75 



77 



65 



22 



21.2 8952 



27 



4 



00 



76 



22 



56 



00 



22.7 



7651 



3° 



4 



00 



75 



58 



64 



44 



20.2 



8873 



28 



4 



30 



76 



20 



55 



36 



21 .6 



7589 



May 1 



3 



45 



75 



02 



64 



34 



20.6 



8847 



29 



4 



00 



75 



95 



55 



37 



21.8 



7586 



2 



4 



00 



74 



91 



64 



1 1 



20.4 



8821 



30 



4 



00 



76 



22 



55 



37 



21.3 



7598 



3 



4 



00 



75 



7i 



63 



61 



19. 1 



8789 



31 



3 



30 



75 



9' 



55 



39 



21.8 



7589 



4 



4 



"5 



76 



14 



63 



34 



19.0 



8754 



June 1 



4 



00 



74 



96 



56 



07 



23-5 



76"43 



5 



4 



00 



76 



35 



62 



86 



18. 1 



8712 



2 



5 



00 



75 



55 



55 



9' 



23.4 



7641 



6 



4 



00 



76 



48 



62 



77 



18.8 



8680 



3 



3 



15 



76 



25 



55 



42 



22. 1 



7586 



7 



4 



30 



76 



06 



62 



63 



19.0 



8656 



4 



4 



30 



76 



38 



54 



87 



21.6 



7521 



8 



4 



00 



75 



93 



60 



12 



20.2 



8278 



5 



3 



45 



76 



20 



54 



27 



20.2 



7472 



9 



4 



00 



74 



95 



57 



-a 



21 .2 



7Q26 



6 



3 



30 



76 



09 



54 



28 



22.0 



7433 



10 



4 



00 



75 



32 



57 



4i 



21.5 



7873 



8 



4 



00 



76 



" 



54 



15 



22.5 



7403 



1 1 



4 



00 



75 



69 



57.69 



2 1 . 9 j 790 1 



9 



4 



00 



75.70 



54.06 



22.4 



7393 



*Cf. §24. 

 and hydrogen with a preponderance of the latter, since the inward diffusion 

 of hydrogen ceases when (subscripts indicating the gases) 



p h = B-T and p = h"p w g 



Thereafter, since p must decrease indefinitely, p h becomes greater than 

 B — r. Thus h"p w g becomes an index for the composition of the diffusing 



