No. 61237. 



Keys. Sliding Resistances. 



869 



61 174. 1 : 3. 



61 206. 1 : 3. 



s. d. 



61.156. Multiple Commutator for Heavy Currents, Figure, for 4 groups of 20 amperes each 7. 0. 



The commutator is used for connecting up 4 groups of primary or secondary cells in three 

 different ways according to requirements: (1) all 4 in series (20 amps, with quadruple the voltage of a 

 group); (2) 2 groups in parallel (40 amps, with double the voltage of one group); (3) all 4 groups in 

 parallel (80 amps, with the voltage of one group). 



61.157. -- idem, larger, for 4x80 amperes 11.0.0 



Sliding Resistances, Figure, for table use and for firmly fixing, of constantan wire wound on an 

 insulating weldless steel tube. 





If specially ordered, all the above listed Eesistances can be supplied without sliding bar 

 and sliding brush, but with feet for using as fixed series resistances. In this case the prices 

 are decreased by 



in Model A Model B Model C Model D Model E Model F 

 About 0. 3. 0. 3. 6 0. 4. 0. 4. 6 0. 5. 0. 6. 



Double Sliding Resistances, Figure, consisting of 2 sliding resistances as above, which can be put 

 in series or parallel. 



Ohm Scale tor reading the resistance inserted, per scale 



Model G H J K 



0.2.6 0.3.0 0.3.0 0.3.6 



Cl. 5848, 5847. 



