4:S2 



Mr. G. W. Walker on the 



(Na) 5890x10-1^ metres and divided by 99*9 cms., the 



length o£ the tubes. 



Thus we oet for the Na line 



/^=l + 7i- 



000H532 P 



5^76 I 



1 + 



•0319 P 



(H--00395076 I ' 76(l + -0039O 



The value of cc for SO2 is '00390, so that there is still a 

 slight difference. The difference is, however, within j)Ossible 

 experimental error. 



At P = 76 and ^=0° C. we get 



;zxa=l + -000674. 



The reduction of Baedecker's observations on the value of 

 the dielectric constant is shown in the following table. 













•^ 1 















a> 



























«35 



§ 







































CD ' 



n 



4- 









i;:^ 





10 





8 



:;;^ 









<_ij 





.^^ 



'^i 



«w 



^ ■ '»^ 





Absolute 









C5 



+ 







C5 



M 



+ 



C5 iM 



Temp. 



Temp. e. 



K-l. 



+ 

 1— 1 



8 



+ 



? 



+ 



1 



iif 





























1 



+ 



1— i 



7 



+ 



^ 



+ 









-^ 









^^ — " 



iO-3 



283-3 



00928 



00936 



2-652 



2266 



16-4 



289-4 



00893 



00922 



2-668 



2-273 



21-6 



294-6 



00869 



00915 



2-695 



2-290 



37-5 



310-5 



00794 



00881 



2-735 



2-305 



42-2 



315-2 



00765 



00867 



2-733 



2-298 



49-4 



322-4 



00734 



00852 



2-747 



2-301 



64-1 



3371 



00669 



00815 



2-747 



2-284 



76-1 



349-1 



00634 



00802 



2-800 



2-315 



103-3 



376-3 



00551 



00755 



2-841 



2317 



e 



0=273 







Mean . 



.. 2-295 



Hence we get 

 K_l 2-295 P 



or 

 K~l = 



76(1 + -00390 ( 

 •001377 P 



il + 



•0319 P 



a 



+ 



76(1 + -00390 

 •0319 P 



}{ 



76(1 + -00390 \^ ' 76(1 + -0039^) 

 The accuracy is only about 1 per cent. 



1 + -0006(91 



e I 



6-10 (9ol. 



1 + 



e 



