a Sphere in a Viscous Fluid. 



Table III. 



Air-bubbles in Aniline. 



335 









Velocity calculated 











cm. 



/sec. 







Radius 



Velocity 







Temp. 



in cm. 



observed, 

 cm. /sec. 







Remarks. 







Parabolic 



Linear 











Formula, 



Formula, 











12° C. 



12° C. 





° C. 













9 6 



•00346 



•082 



•045 





Group of three bubbles. 



96 



•00061 



•171 



•164 







9-8 



•00G90 



•188 



•179 







9 8 



00719 



•202 



•194 







9-6 



•00719 



•202 



•194 







96 



•00750 



•260 



•212 







96 



•00865 



•355 



•281 





Group of three bubbles. 



11-6 



■00977 



•390 



•359 







9-8 



■0103 



•372 



•402 



04 





100 



•0112 



•453 



■471 



•16 





12*2 



0126 



•615 



•600 



•31 





9-8 



•0132 



•657 



•655 



•42 1 

 •56 J 



f Formed by the union 



9-8 



0144 



•727 



•777 



1 of two bubbles. 



10-0 



•0150 



■750 



•845 



•65 





100 



•0152 



■696 





■69 





107 



0164 



•906 





•85 





110 



•0172 



100 





•93 





10 7 



•0195 



1-23 





1-23 



f Formed by the union 



10-7 



•0201 



1-33 





1-31 



\ of two bubbles. 



107 



•0206 



1-37 





1-37 





100 



•0210 



1-37 





1-43 





10-4 



•0210 



1-45 





1-43 





10-7 



•0213 



1-45 





146 



f Formed by the union 

 [ of two bubbles. 



10-7 



■0230 



1-71 





1-68 



100 



•0259 



2-00 





2-05 





10-7 



ro-4 



•0259 

 •0265 



1-96 

 209 





205 

 212 



f Formed by the union 

 [ of two bubbles. 



10 



•0276 



2-18 





2-26 





104 



•0270 



2-18 





226 





100 



•0287 



2-29 





2-36 





11-8 



•0330 



300 





293 





11-8 



•0345 



309 





312 





110 



0351 



343 





321 





100 



0374 



343 





3-50 





120 



•0535 



600 





5-56 





11-8 



•0539 



6-43 





560 





120 



■0552 



6 00 





5-77 





An inspection of this table shows that when the radius of 

 the bubble is as great as one-half the critical radius the 

 velocity agrees with that deduced on the assumption of 

 parallel flow, supposing that no slipping occurs at the 

 boundary. For bubbles of larger size the velocity agrees 

 with that calculated by means of the empirical formula. 



2 A2 



