No. 63589 



Miscellanea. School Experiments with Rb'ntgen Rays. 



1073 



63 585. 1 : 9. 



Sliding Resistances, patterns A F, p. 869, are if specially ordered, supplied also 

 arranged vertically in accordance with Fig 63,570 G, and with one or two contact brushes. 

 The latter arrangement permits of numerous adaptations as shunt resistance. 



Extra Price for vortical arrangement, cf. Fig. 63 560 G, with one contact brush: 



Pattern 



List No. 

 



A 

 63,570 

 0.3.0 



B 



63,571 

 0.3.8 



- idem, with two contact brushes : 

 List No. 63,576 63,577 

 0. 8. 0. 8. 8 



C 



63,572 

 0.4.8 



63,578 

 0.9.8 



D 

 63,573 

 0.4.8 



63,579 

 0. 10. 8 



E 



63,574 

 0.5.0 



63,580 

 0. 11. 



F 



63,575 

 0.5.0 



63,581 

 0. 12. 8 



63.582. Cathode Ray Tube after F. Braun, cf. Figure 61,499, p. 898, with osmose 

 regeneration 



Since the tubes, in a similar manner to the Rontgen tubes, become harder in use, it is advisable 

 to fit the regenerating device, which permits of introducing gas into the i_iterior. 



63.583. - - idem, larger, 1 m long, with screen 130 mm diameter, cf. Fig. 61,500, p. 898, 

 with osmose regeneration 



63.584. - - idem, after Braun-Wehnelt, cf. Fig. 61,501, p. 898, with osmose regene- 

 ration 



63.585. Switchboard for Accumulators, Figure, specially adapted for electro-chemical 

 purposes, for connecting to pressures up to 16 volts and currents to 20 amps. . . . 



The switchboard, of marble with wood frame, contains: 1 precision voltmeter 25 volts, 1 volt- 

 meter switch, 1 precision ammeter 20 amps., 1 main switch, 1 stepped sliding resistance permitting 

 regulation in fine steps and over a wide range, also 1 terminals. 



Apparatus for School Experiments with Rontgen Rays. 



(Cf. in this connection our complete Introduction, sent on request.) 



Induction Coils with Accessories, X-ray Tubes, Fluorescent Screens: see pp. 978 986. 

 62,730. Carton with Strips of various Metals, also Glass 



63.586. Carton with a Glass Strip 6 mm thick and an Aluminium Sheet Strip 0.5 mm thick 



63.587. Fluorescent Screen, size 8x16 cm 



63.588. Phalanges in Glass Tube after Weinhold, fqr shewing that X-rays do not undergo 

 any appreciable refraction or reflection (W. D., p. 875) 



63.589. Metal Disc with Insulating Grip, for shewing ionisation of the air (cf. Fig. 4 of the 

 Introduction) 



Cf. in this connection also Nos. 62,731/2, p. 986. 



CL G20S. 



s. d. 



1. 8.0 



3. 8.0 



2. 3.0 

 9. 0.0 



0. 10. 

 0. 4.0 

 0. 4.0 



0. 6.0 

 0. 6.0 



