N... (!.> -.'si. 



Electromagnets. 



953 



62281,62286. 1:6. 



62 288, 62 282, 62 283, 62 287. 1 : 10. 



02.285. Silver Coin with Pyramid Mirror, after Tyndall, for showing damping of a metallic s 

 body when rotated in the magnetic field, Figure (Tyndall, Heat [Die Warme] r 



4' h German Edn., p. 87), with suspension device 1. 4. 



62.286. Device for Melting easily Liquefying Metals by rotating in the magnetic field, after 

 Tyndall, Figure (Tyndall, Heat [Die Warme], 4 lh German Edn., p. 91) 4. 10.0 



A copper bush filled with solid metal is rotated rapidly between the pole pieces of an electro- 

 magnet; after short time the metal is melted by the eddy currents present. 



62.287. Polarisation Apparatus, Figure, for showing the Rotation of the Plane of Polari- 

 sation by magnetizing forces, with two nicols 12 mm, one double quartz plate and 

 divided circle with index; Faraday Glass Parallelepiped 70x18x18 mm, in box with 



two pierced pole pieces j 5. 0. 



Bismuth Spirals for measuring Field Density: sec Nos. 62,306 and 62,307, p. 956. 



02.288. Large Electromagnet, V i g u r e, for all paramagnetic and diamagnetic experiments, 



with magnets vertically arranged, with 4 coils with device for putting the windings 

 in series or parallel, with commutator and interrupter, frame running on rollers. Length 

 of magnel cores 430 mm, diameter 67 mm; length of each coil 200 mm, diameter 130 mm; 

 with massive pierced pole pieces and two pair differently shaped conical attachments 

 for same 30. 0. 



The electromagnet is constructed for momentary loads of 30 amps, which are applied when tin- 

 windings of the electromagnet are in series and connected direct to 65 volts D. C. working pressure. 

 If the working pressure is 110 volts a proportionate resistance should be inserted in series. If desired, 

 and at an extra cost of 1, the electromagnet is also supplied for connecting direct on to 1 10 or 220 volts. 

 The maximum current density is then correspondingly lower, but the number of windings higher, so 

 that tin- total number of ampere-turns is approximately the same. 



As Accessories we recommend the same as those for Electromagnet No. 62,281; the prices 

 being the same as in that case. 



Cl. 2592, 2593, 2588, 2586, 

 2587, 2589. 



