976 



Voltaic Electricity. Section 7 : Induction Currents. 



Xd. 62470- 



62470. 1:3. 



62 471. 1 = 5. 



62 478. 1 : fi. 



62480. 1:8. 



62.470. Apparatus for showing the Extra Current, after Dr. Geschbser, F i g u r e (Ztschr. t 



f. (1. phys. u. chem. U. 11, 1898, p. 83) 1. 1. tl 



62.471. Apparatus for demonstrating the Extra Current, Figure (M. P. 9"> Edn. III. 



Fig. 742) 1. 12. 



62.472. Experimental Arrangement for proving Self-induction, after Kann. with a glow lamp 

 connected in parallel to a coil of high self-induction (Ztschr. f. d. phys. u. chein. U. 16, 



1903, p. 284) 1. 10. (i 



Standards of Self-Induction after \Vien, Figure, constructed in accordance with the data 

 of the Physikalisch-Teehnische KVichsanstalt (E. T. Z. 1903, p. 504). 



Henries 0,0001 0,001 0,01 0,1 0,5 1 



Value cm 10 :> 10 H 10 7 ln s 5 10 s K)' 1 



List Xo. 62,473 62,474 62,475 62,476 62,477 62,478 



1.5.0 1.5.0 1.12.0 2.5.0 3.10.0 4.10.0 



These standards arc wound on iron-free reels of serpentine stout- aud fixed so as to allow of no play. 

 By obviating all metal parts with the except ion of the small terminals and by sub-dividing the winding 

 the occurrence of eddy currents is prevented. 



The standards arc calibrated to within U.IMi-J of their value and can be, provided with certificates 

 from the I'hysikalisch-Technische Rcichsanstall on payment of the necessary fees. 



02, 479. Induction Coil for calibrating Ballistic Galvanometers, consisting of a long coil thr 

 field density of which can he calculated from the dimensions, and a short coil slipped 

 over the former 1. 5. 



02,4X0. Apparatus after I'liicker and Fessel, Figure, for causing an induction current 



by rotating two magnets (M. I'. 9"' Fdn. III. Fig. 58 4) 1. 10. o 



52,062. -- idem, for the Whirling Table. Figure on p. 2SS 1. 8.0 



62,4-si. Apparatus for Unipolar Induction, alter Weber (M. I>. 9 th Edn. Ill, Figs. 590 and :.'.!) 5. o. o 



62,4X2. Apparatus for showing Damping by Induction, Figure (W. I). Fig. r>:>7 |5.".o|), 



copper stirrup with magnetic needle swinging therein 0. is. o 



ti-.is.',. Apparatus for showing Damping by Induction, after Weinhold, Figure (W. l>. 



Fig. 558 [531 j), for the horizontal Projection Apparatus <>. is. o 



02.4X4. v. Waltenhofen's Pendulum for showing the Damping Effect of Induction, F i g u r e 



(W. I). Fig. 559 |532|) 2.10.0 



OL inis, 3708. 

 J8I9. 267-2. 



