826 



Static Electricity. 



No. 6o:.:w 







60 538. 1 : 2. 



60539. 1:3. 



60 540. 1 : G. 



60536. 1:4. 



60 541. 1 : 30. 



60542. 1:15. 



60 543. 1 : 5. 



60.536. Electric Dancing Balls, Figure, with metal mounts, on stand (M. P. 10 th edn., 

 IV, 1, Fig. 150; 9 th edn., Ill, Fig. 162; Gan.-Eein., Fig. 754) 



60.537. Electric Mortar (W. D., Fig. 477 [452]) 



60.538. Apparatus for Igniting Ether, F i.g u r e (W. D., Fig. 450 [423]) 



U0.539. -- idem, different pattern, Figure (M. P. 9 th edn., Ill, Fig. 166) 



60,540. --idem, Figure (Kolbe-Skellon, Introduction to Electricity, Part I, Fig. 47) 



<>o,54l. Apparatus for explaining Potential Difference and Potential Drop, Figure (Hb'fler, 

 Physik, 1904, p. 438), comprising 1 small table with ebonite top, 2 insulating stands, 

 2 wood rods 3 m long (folding), and 6 electroscopes, without influence machine . . . 



60.542. - - idem, vertical pattern, Figure 



60.543. Press with Portrait Pattern, Figure, for producing a portrait of Benjamin Frank- 

 lin by an electric discharge 



A piece of silk is placed on the baseboard of the press and on top of this silk ;i pattern portrait 

 of cardboard; the pattern is coated externally on one side with tinfoil, this side must face upwards. 

 The pattern is then covered with a piere of gold leaf in such manner that it also touches the (wo 

 tinfoil sheets; a second piece of board is placed on top and the press screwed down so as to expose 

 the gold leaf to the discharge. 



60.544. Electrostatic Motor, on stand, Figure (Fr. phys. Techn. II, 1, Fig. 88). . . . 



s. d. 

 O.JO. 

 0. L'. 

 0. 1.6 

 0. 1'. 

 0.10. 



1.10. (I 

 0. 15. I) 



0.13. o 



(1. si:.:.. :.Ti7. :,; 



ran 



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