798 



Static Electricity. 



No. 60 l.-,7 



60160. 1:6. 



60 162. 1 : 6. 



60 163 and 60 164. 1 : 6. 



60158. 1:12. 



60 166. 1 : 4. 



60.157. 5 Rods of Wood, Glass, Ebonite, Sealing Wax and Sulphur, for suspending by means * <i- 

 of the double hooks, No. 60,155, each 60 cm long ................ 0. lo. <> 



60.158. Electric Horizontal Pendulum, Figure (W. D., Fig. 425 [408]), with hollow alu- 

 minium ball, on glass rod, on stand with levelling screws. Highly sensitive and protected 



by the use of the aluminium ball instead of the glue ball ............ 1. 4. u 



60.159. Simple Electric Pendulum (Gan.-Man., Fig. 615, and Gan.-Eein., Fig. 705) .... 0. >. o 



60.160. Double Electric Pendulum, Figure, on insulated stand (Gan.-Man., Fig. 617, and 

 Gan.-Eein., Fig. 709) ............................. 



60.161. Double Electric Pendulum, Kolbe's, Figure, with two rotary arms (Kolbe-Skellon, 

 Introduction to Electricity, Part I, Fig. 2) ................... 



60.162. Apparatus for the Fundamental Electrical Experiments, as suggested by Gustav Wiedc- 

 tnann, Figure, comprising a- stand to which is fitted an insulated needle on which 

 a glass rod turns. At the ends of this rod are fitted each 1 ebonite and glass disc. 

 In addition there are: 2 ebonite and glass slabs on insulating handles, 2 rubbers, 1 of 

 amalgamated felt, the other of cat-skin, and 1 rod with amalgamated leather on one 

 end and catskin on the other, in case (Ztschr. f. d. phys. u. cliein. I". 4, p. 196) . . 



60.163. Glass Tube, closed at the ends, and with cap fused in, turning on insulating stand. 

 Figure ......................... .......... 



60.164. Ebonite Rod, with brass cap, on insulating stand, rotary, Figure ....... 



60.165. Insulating Stand of No. 60,163, alone ..................... 



i;<Ufi<>. Horizontal Pendulum with two balls, on stand, Figure ........... 



2 quid- thin, light, glass balls, 1 being metallically covered, or carried by a thin balance heam 

 which rests on a, point. 



<;<i,ir,7. Insulating Stand (Mentzner's) (Fr. phys. Techn. II, 1, Fig. L') .......... 



60,168. Insulating Stand (Friedr. C. G. Mailer's) (M. T., Fig. 161) ........... 



8. 5. 



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1. l.o 



0. T.d 

 0. 9. 

 0. 6.0 



0. IS. (I 



0. 12. ( 

 0.12.0 



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