64 Mr. A. M. Worthington on Calculating Surface-Tensions 



Mercury in Alcohol. 

 D = 13-543-0-7906. 





No. 



L. 



K-Jc. 



1 



3-282 1/ 



1 



b' 



Grams per cm. 



S. tension 

 (Quincke). 



S. tension, 

 corrected. 



1. 

 2. 

 3. 



cm. 

 1-5 



it 



cm. 

 •2443 

 •2574 

 •2422 



I -20313 



•0037 - 



•3805 

 •4224 

 •3740 



1 -3569 



Mean of 6 measures . . . 



•4025 





(The mean of K— h used to calculate -r was -248.) 



Olive-oil in Alcohol. 

 D = -9136--7906. 



No. 



L. 



K-&. 



1 



1 



y 



Grams per cm. 



S. tension 

 (Quincke). 



S. tension, 

 corrected. 



3282 L" 



3. 

 4. 



1-405 



•1975 



•1872 



j- -21686 







( -00240 

 ( -00215 



1 -00210 



Mean of 4 measures... 



-00226 





(The mean of K- h used to calculate t was *1917.) 



The corrected results with hyposulphite of soda, bisulphide 

 of carbon, and petroleum do not agree satisfactorily with the 

 measures made with capillary tubes. 



The general effect of the correction is to reduce the results 

 by about 10 per cent., but in some cases, especially of drops 

 of one liquid in another, the value of L is so small that the 

 accuracy of the correction may be questioned. I hope soon 

 to be able to lay before the Society fresh determinations of 

 the surface-tension in these cases. When L reaches or 



