996 



Voltaic Electricity. Section 7: Induction Currents. 



No. 62808 



62808. 1:8. 



62809. 1:5. 



62810. 1:4. 



62 816. 1 : 4. 



62820, 62821. 1:5. 



62.808. Glow Lamp Filament in Receiver, after Hartl, Figure, for showing that the carbon 

 filament does not burn up in vacua but that it does in air (Ztschr. f. d. phys. u. chem. 

 U. 10, 1897, p. 235) 



62.809. Carbon Filament Lamp after Grimsehl, Figure (Abhandlungen z. Didaktik u. Philo- 

 sophic d. Naturwissenschaft, Nr. 1, Fig. 3; published by J. Springer, Berlin, 1904) . 



62.810. Glow Lamp Model after Grimsehl, Figure (Ibid., Fig. 4) 



Steel Wire for Glowing Experiments: 



List No. 62,811 62,812 62,813 62,814 



Diameter mm 0.15 0.2 0.3 0.4 



1 Small Coil 0.0.7 0.0.7 0.0.7 0.0.7 



62.815. Small Arc Lamp, cf. Fig. 62,816, self -regulating, with reflector; can be worked by 

 Dynamo No. 62,767 



62.816. Arc Lamp, larger, Figure, with reflector, suitable for Machines Nos. 62,771 to 

 62,783 a, also 62,786 and 62,789 



62.817. Carbon Rods for above Per metre 



62.818. Contac 'Lamp after Eeynier, with fine carbon rod for sliding on carbon roller . . 



62.819. Carbon Rods for above Per metre 



62.820. Jablochkofi's Candle (Gan.-Man., Fig. 836), Figure 



62.821. Holder with Terminals for above, Figure 



62.822. Carbon Terminals after Briisch, Figure, without the Bunsen Stand figured, but 



inclusive of 2 carbon rods for 10 20 amps., cf. Fig. No. 62,131 



Carbon Rods for above for 10 20 amps per pair 



. s. d. 

 1. 6.0 



0. 18. 

 0. 8.0 



2. 0.0 



2. 10. 

 0. 0.6 

 1.10.0 

 0. 0.6 

 0. 1.0 

 0. 8.0 



1.12.0 

 0. 0.5 



(I. 4147, 5925, 

 5926, 2766, 



5291. 

 6016. 



