M. E. Edlund on the Nature of Galvanic Resistance, 201 

 Table III. — Coefficients of Elongations and of Retractions. 



A. 



c. 



E. 



F. 



4 

 5 

 6 



000 

 00 

 



000002288 ef -000001377 r 



000002928 e j-000002196 

 '000003660* 1-000001647 r 

 000004575 e*'-00IK)02105 r 

 000003019 e -000001098 rf ,00000192 

 000002562* 1-000001555 r 000001006e 



000000732 ef 

 000000732 ef 

 000002013 e 

 000002471 e* 



•000001281 ef 

 •0000021 96 e 

 000002562 e* 

 •000002088 e 

 000001 830 e 

 000001647 e 



•000001281 rt 

 000002196 r 

 •000002562 r* 

 •000002088 r 

 000001830/- 

 •000001 647 r 



000001943 e* 

 000000607 r 

 000000972 rf 



'•000003400 e* -000000607 r 

 000001212 r* 



000001457 e* 



•000001212 e j -000000607 <? 

 000000607 ef -000000364 rf 



000000486 r f 



000000607 e 

 000001 212 e* 

 000000486 ef 



XXI. An Inquiry into the Nature of Galvanic Resistance, together 

 with a theoretic Deduction of Ohm's Law and the Formula for 

 the Heat developed by a Galvanic Current. By E. Edlund J. 



1. TT is known from the science of light that the sether in 

 A material substances has a greater density than in empty 

 space. Matter must therefore possess the power of attracting 

 the molecules of sether, while these repel each other. Matter 

 condenses within itself sether from the surrounding space until 

 the attraction between the molecules of the matter and an aether 

 molecule outside the substance is no greater than the repulsion 

 between the sether already condensed by the body and the said 

 exterior molecule of sether. Since the resultant of these two 

 forces upon the external free sether is =0, the body together 

 with the sether condensed by it exert no influence upon the 

 equilibrium of the free sether, but this distributes itself just as if 

 the body and the condensed aether were in reality not present. 

 It follows that, if there is to be equilibrium in the mass of sether, 

 the free sether within the body must have the same density as 

 that outside of it. If, for example, the free sether within were 

 for a moment to possess less density than the external sether, 

 equilibrium would inevitably be restored by sether streaming 

 into the pores of the body ; and if the relation were reversed, 

 sether must stream out. The density of the free sether in all 

 material bodies is therefore equal. Consequently the sether 

 within bodies consists of two portions : one is attached by the 

 attraction of the molecules of the body, and may be greater or 



* Maximum. 



t Minimum. 



X Translated from a separate impression, communicated by the Author, 

 from Poggendorff's Annalen, vol. cxlviii. p. 419, having been read before 

 the Royal Academy of Sciences at Stockholm on the 11th September, 1872. 



