326 SEC. 10. ELECTRICITY. 



1395b. Apparatus for electric osmose. 



Prof, ffittorf, Munster. 



In each of the three divisions formed in the glass cylinder by the clay 

 plates the electric endosmose (when the vessel is quite filled -with the solution 

 of an electrolyte) is produced or prevented according as, on passage of the 

 current, the three openings are free or are closed. With the arrangement it 

 is proved that the transference of the ions is quite independent of the electric 

 endosmose. (Pogg. Ann., Bd. 96.) 



d. EFFECTS DUE TO THE FORCE BETWEEN CURRENTS AND 

 MAGNETS. 



1396. Apparatus for showing the Rotation of a Bar- 

 magnet on its axis by the passage through it of an electric 

 current. George Gore, F.R.S. 



(See Proceedings of the Royal Society, Vol. 24, p. 121.) 



1397. Apparatus for showing the notation of a Copper 

 Wire upon its axis between the poles of two magnets by passing 

 through it an electric current. George Gore, F.R.S. 



(See Proceedings of the Royal Society, Vol. 24, p. 121.) 



e. EFFECTS DUE TO THE FORCE BETWEEN CURRENTS AND 

 CURRENTS. 



1398. Apparatus for demonstrating the Laws of Ampere. 



Geneva Association for the Construction of Scientific In- 

 struments. 



The mode of suspension used in this apparatus allows the conductor to 

 make a complete revolution. 



The current passes from the movable conductor into an annular cup, con- 

 centric with the axis of motion and filled with a conducting liquid. 



All the conductors are made of aluminium so as to lessen their weight as 

 much as possible. 



The apparatus may be used for a great number of experiments ; it is spe- 

 cially adapted for the following demonstrations : 



1. Parallel currents in the same direction attract one another, and those in 



contrary directions repel one another. 



2. Inclined currents in the same direction attract one another, and those in 



contrary directions repel one another. 



3. The attraction and repulsion of the same current are equal. 



4. A sinuous current acts like a rectilinear current of the same general 



direction and having the same extremities. 



5. A closed current takes a direction perpendicular to the magnetic meridian. 



6. A solenoid has the essential properties of a magnet. 



7. The elements of the same current repel one another. 



The mutual action of magnets and currents is demonstrated by means 

 of the same apparatus, by replacing one of the currents by one or more 

 magnets. 



