954 



Voltaic Electricity. Section 6: Electro-magnetism and Electro-dynamics. 



No. 62 2X9 



62 290. 1 : 10. 



62282C. 1:8. 



62 283 C. 1:8. 



62 284 C. 1:10. 



62 285 C. 1 



62 286 C. 1:8. 



62,289. Electromagnet with Vertical Magnet Limbs, somewhat smaller pattern; magnet limbs 



350 mm long and 52 mm diameter; length of each coil 160 mm, diameter 100 mm . 22. 10. o 



The 

 junction with 



electromagnet is built for a maximum momentary current density of 25 amperes in con- 

 ith 65 volts. As regards other voltages and accessories, the same remarks hold as for No. 62.-JSS. 



62,290. Large Electromagnet after Ruhmkorff, F i g u re , for para- and diamagnetic ex- 

 periments, with horizontal magnet limbs 70 mm diameter and 220 mm length, pierced 

 for taking the polarisation apparatus; coils 200 mm long and 130 mm diameter, with 

 two pair different shaped pole-pieces, with pole commutator and interrupter (M. P., 

 9'" Edn., Ill, Fig. 854) 25. 



As to current density and voltage all the remarks made under No. 62,288 hold good here also. 

 The accessories are also the same as for No. 62,281 and are supplied at the same price. Figs. 62,282 C 

 to 62,286 C show the construction of these accessories for No. 62,290. 



62,291. Electromagnet, Figure, with arrangement for enabling the magnet limbs to be 

 used vertically and horizontally: coil 150 mm length, 120 mm diameter; magnet limbs 



170 mm long, 60 mm diameter 



As regards current and voltage, also accessories: cf. remarks under No. 62,288. 



02.292. Large Half-ring Electromagnet after du Bois, cf. Fig. 02,299, p. 950; with arc-shaped 

 magnet limbs on a massive base-plate forming the yoke; with one pair cylindrical and 

 one pair conical pole pieces, one distance piece for 1 mm pole distance of the conical 

 pole pieces, Stand and Spanners (Ztschr. f. lust rumentenkunde. 1899, p. 357). ... 1 



By loosening the fixing screws the limbs can be moved apart and rotated with reference to each 



( '1.2595, 2596. 2598, 

 2599,2600,2601. 



2-1. 0.0 



0. 



