﻿of the common Surface of two Liquids, 



251 



As a matter of precaution, the meniscus was brought to a well- 

 moistened place of the capillary tube by inclining or raising the 

 latter in the caoutchouc rings. 



By the methods described, glass tubes were obtained which 

 were always easily wetted by the liquids applied, so that the 

 angle co could be put equal to zero, and hr gave directly the spe- 

 cific cohesion cP, from which, by multiplication with half the 



specific gravity -, the capillary-constant a was obtained in mil- 



ligrammes. 



The specific gravities were determined with an hydrometer 

 suspended by a thin platinum wire and a delicate balance. 





Table L- 



-Heights in 



Capillary Tubes. 





Water. 



Hyposulphite of soda. 



No. 



2r. 



7i. 



hr. 



No. 



2r. 



h. 



hr. 



2. 

 3. 

 4. 



5. 



millim. 

 0-252 

 0-287 

 0-356 

 0529 

 0-840 



millims. 



115-2 



101-7 



81-2 



55-7 



34-3 



sq. mil. 

 14-19 

 14-57 

 14-44 

 14-74 

 14-41 



1. 

 2. 



3. 



millim. 

 0-444 

 0-533 



0-588 



millims. 

 60-6 

 50-8 

 46-7 



sq. mil. 

 13-45 

 13-55 

 13-74 







Mean.... 



.. 13-58 







Mean.... 



.. 14-47 



Bisulphide of carbon. 





Olive-oil. 





]. 

 2. 

 3. 



0-305 

 0-344 

 0364 



34-4 

 30-7 

 29 



5-240 

 5-284 

 5-290 



.. 5-273 



2. 

 3. 



0-268 

 0-387 

 0-623 



53 



36-4 



23-5 



7107 

 7 05 

 7321 







Mean.... 



.. 7159 





Oil of turpentitn 





Chloroform. 



1. 

 2. 



3. 

 4. 



0094 

 0-357 

 514 



0-623 



164 

 35-1 

 24-5 

 19-7 



6-243 



6-258 

 6-295 

 6139 



1. 

 2. 

 3. 

 4. 



0-079 



0-280 

 0-334 

 0-838 



95 



26-3 



21-9 



8-6 



3-742 



3-683 

 3-662 

 3-606 





Mean.... 



.. 6-234 





Mean.... 



.. 3-673 



Petroleum. 



Alcohol. 



1. 

 2. 



3! 

 4. 



211 

 0-235 

 0-350 

 0-364 



60-1 

 55 1 



36-5 

 35-8 



6-348 

 6-484 

 6-393 

 6-519 



1. 



2. 

 3. 



0-08S 

 0-331 

 0-606 



132-9 

 33-6 

 18-8 



Mean.... 



5-720 

 5-562 

 5-696 



.. 5-659 







Mean.... 



.-. 6434 



