188 Mr. E. B. Rosa on the Specific 



We have also in this case 



A= v 2 -^r *- ,fl6 cos(m& + j ) 





my \ 4 / J 



*<{••• (22) 



approximately, so that the value of w given by (10) and 

 (13) is insensible except close to the edges. Near the edge 

 x = h we have, for example, 



At the edge itself the deviation from the cylindrical form 

 is comparable with A, but it rapidly diminishes as we pass 

 inwards, at the same time fluctuating in sign. The latter 

 result may perhaps be unexpected, but a little consideration 

 will show that it is intimately bound up with the supposition 

 we have made, that there is no resultant force on the ends 

 of the band. The amplitudes of the fluctuations diminish, 

 however, so rapidly that it is not likely that this feature of 

 the strain could ever be made the subject of observation. 



XXI V. Specific Inductive Capacity of Electrolytes. By 

 Edward B. Rosa, Fellow of the Johns Hopkins University *. 



[Plate VI.] 



I. rpHE study of the specific inductive capacity of water 

 A and other conducting liquids was suggested to me 

 about a year ago by Professor Rowland. Cohn and Arons 

 and others had recently found values of K for water, ranging 

 from 75 to 85 and for alcohol from 25 to 30 ; these exceeded 

 so many times the value of K for most non-conductors that it 

 seemed possible that there might be a relation between the 

 conductivity and inductivity f ; that these high values were 

 directly due either to comparatively large conductivity, or 



* Communicated by the Author. An abstract of this paper was read 

 before the American Association for the Advancement of Science, Indian- 

 apolis, August, 1890. 



t This seems to be a somewhat prevalent opinion. Thus, Andrew 

 Gray (' Absolute Measurements in Electricity and Magnetism/ p. 491) 

 says, referring to Cohn and Arons' determination of K for water and 

 alcohol : " These substances have, however, considerable conductivity, 

 which would tend, of course, to give an apparently high specific induc- 

 tive capacity.'' 



