924 



Voltaic Electricity. Section 4: Ohm's, Kirchhoff's and Joule's Laws. 



N.I. 111997 



82 006. 1 : 6. 



62 014. 1 : 6. 



62 015. 1 : 5. 



61.997. High-Tension Rheostat, Figure, with 14 plugs: 1, 2, 3, 4, 10, 20, 30, 40, 100, 

 200, 300, 400, 1000, 2000 ohms 



In this apparatus, which is intended to be used as an additional resistance, etc. in circuits charged 

 with potentials dangerous to life, the metal parts are protected with ebonite against accidental contact 

 with the hands, the plugs having long ebonite grips. 



61.998. idem, with 14 plugs: 5, 10, 20, 30, 40, 100, 200, 300, 400, 1000, 2000, 2000, 

 2000, 2000 ohms 



61,9J9. High Tension Decade Resistance with 10x10,000 ohms . 



Each two are connected with a piece of cable, highly insulated, and plugs provided with long ebonite 

 grips form the connection between the common rails and the individual segments. The winding is sub- 

 divided a number of times. 



School Rheostats of Manganin, F i g u r e, with resistance coils mounted open, Ihus securing 

 comprehensiveness. Each plug block is provided with a conical hole for inserting shunt 

 terminal. The accuracy of adjustment exceeds by 0.5 per cent the standard prescribed 

 by the Physikalisch Technisehe Reichsanstalt for technical resistances. Two shunl 

 terminals are given in with each resistance. 



Plugs: 0.1; 0.2; 0.3; 0.4 ohms 



1 ; 2 ; 3 ; 4 ohms . 



10; 20; 30; 40 ohms 



100; 200; 300; 400 ohms 



1000; 2000; 3000; 4000 ohms 



0.1; 0.2; 0.3; 0.4; 1; 2; 3; 4 ohms 



1; 2; 3; 4; 10; 20; 30; 40 ohms 



10; 20; 30; 40; 100; 200; 300; 400 ohms 



100; 200; 300; 400; 1000; 2000; 3000; 4000 ohms 



0.1; 0.2; 0.3; 0.4; 1; 2; 3; 4; 10; 20; 30; 40 ohms 



1; 2; 3; 4; 10; 20; 30; 40; 100; 200; 300; 400 ohms .... 





 9. 



11' 



10. I) 



II. (I 



(I. (I 

 0.0 



(I. I) 

 o.o 



II. 

 10. II 



1(1. (I 



1(1.0 

 10.0 



0. II 



(I. II 



2; 3; 4; 10; 20; 30; 

 3000; 4000 ohms . 



40; 100; 200; 300; 400; 1000; 2000; 



6. 10.0 



Wheatstone Precision Bridges of Manganin, with series plugs, cf. Fig. 62,014. 



62,012. with 20 plugs: in the ratio arms: 1; 10; 100; 100; 10; 1; in the variable arm: 

 0.1; 1; 1; 2; 3; 4; 10; L'O; 30; 40; 100; 200; 300; 400 ohms; measuring capacitv 

 0.001 to 111.110 ohms 14. it. (I 



Cl. 4126, 5836, 

 5993. 2496. 



