v,,:. in. 



HP. expended 



Current in 

 outer cir- 

 cuit in Am- 



OHMS 



DIAGRAM OF EXPERIMENTS WITH Ds DYNAMO. 



33 OHMS. 



30-0 OHMS. 



48 9 OHMS. 



10 20 30 



E.M.F. CURVES WITH D,, SD,, DSD, MACHINES. 



