﻿of the common Surface of two Liq uids. 



253 



For bisulphide of carbon, oil of turpentine, and petroleum, 

 the plates forming the trough were fastened together with com- 

 mon glue; for the experiments on absolute alcohol, with pure 

 paraffine. For the sake of simplicity the negative signs are 

 omitted before K, k, and K — k. 2r gives the greatest diameter 

 of the drop, or the horizontal distance of two opposite vertical 

 meridian-elements k. When, in the column for 2r, two commas 

 denote that the diameter of the air-bubble is the same as that of 

 the one above, both observations relate to the same air-bubble, 

 but the second was made a longer time after the rising of the 

 air-bubble than the first. The value of the capillarity-constant a 

 in the last column is calculated by means of equations (4) and 

 (?) (§ 3). The rest of the arrangement of the Tables speaks 

 for itself. 



Table III. 



-Flat Air-bubbles in a solution of Hyposulphite of 

 Soda. a = 1-1248. 



No. 



2r. 



K. 



Jc. 



K-#. 



KVi. 



a. 



1. 

 2. 



3. 

 4. 



milliras. 

 20 



28-2 

 >> 



millims. 

 5070 

 5015 

 5-358 

 5-323 



millim. 

 1-302 

 1 189 

 1-620 

 1-661 



millims. 

 3-768 

 3-826 

 3-738 

 3-662 



millims. 

 3-585 

 3546 

 3-788 

 3-763 



mgrms. 

 7-984 

 8-233 

 7-856 

 7541 













Mean 7"903 



Flat Air-bubbles in Distilled Water. 

 <r=l. Temp. =25° C. 



l. 

 2. 



•S. 



4. 

 5. 

 6. 



7. 



18 



276 



21 



21-9 



20 



20-8 



307 



5-628 

 5-552 

 5-509 

 5-255 

 5 082 

 5315 

 5612 



1 516 

 1-483 

 1-537 

 1-212 

 1071 

 1090 

 1-612 



4112 

 4-069 

 3-972 

 4043 

 4011 

 4-225 

 4-000 



3-978 

 3-926 

 3-895 

 3-716 

 3-594 

 3-758 

 3-969 



8-455 

 8-280 

 7-905 

 8-170 

 8-040 

 8-920 

 8-000 













Mean 8-253 



Flat Air-bubbles in Bisulphide of Carbon. 

 o- = 1-2687. Temp. =25° C. 



]. 



2. 



3. 



(25) 

 27 



(35) 



3-071 

 3081 

 3-121 



0891 

 0-851 

 0722 



2180 

 2-230 

 2399 



2171 

 2179 

 2-207 



3015 

 3157 1 

 3-651 ! 













Mean 3274 



