No. C1881. 



School Rheostats. 



915 



61 875 A. 1:10. 



61 875 C. l:ld. 



61 880. 1 : <>. 



s. (1. 



<>1.X77. Single Ohm, alone, cf. Fig. 61,875 C, to the right 1.10.0 



<il,-s79. Switch Contact Rheostat for school use, Figure 5. 5. 



The resistance comprises three decades of 10 x 1, 10 x 10 and 10 x 100 ohms, a total of 1100 ohms, 

 which can be used both in series and, by loosening the two connecting bars, separately in single decades 

 for different circuits. The handle, which is manipulated backwards and from the front serves at the same 

 time as a resistance indicator. The non-inductively wound resistances are placed on the back of the appa- 

 ralus in a comprehensive fashion, being laid open. The maximum load is for the units, 2 amperes; for 

 tin' tens, 0.8 ampere; and for the hundreds, 0.2 ampere. 



<H.X80. --id e m, with slide wire resistance, Figure, of 1 ohm, divided into 0.1 ohm, 



for maximum load of 2.5 amps 6. 10.0 



<>l,ssi. Slide Wire Resistance alone ... l- r>. o 



Cl. 5369, 537 1 , 5370, 2472, 

 3937. 58* 



