38 



KEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



[36] 



power B lamps) in circuit, respectively. By deducting from these 

 experiments, respectively, the power required to run the engine and 

 dynamo we obtain the power applied to the shaft, and from this quan- 



Fig. 14. 



tity we deduct the friction of the load, leaving as a remainder the 

 net power required to revolve the armature in the magnetic field with 

 those respective lamps in circuit. 



DISTRIBUTION OF THE POWER. 



Horses-power required to run the engine and dynamo 3. 56 



Indicated horses-power required to run 45 lamps - 5. 79 



Indicated horses-power required to run 50 lamps 5.85 



Indicated horses-power required to run 70 lamps 6. 92 



Net horses-power applied to the revolution of the armature in the magnetic 



field, using 45 lamps 1. 80 



Net horses-power applied to the revolution of the armature in the magnetic 



field, using 50 lamps 1. 85 



Net borses-power applied to the revolution of the armature in the magnetic 



field, using 70 lamps 2.84 



Mean number of lamps, per indicated horse-power, using 45 lamps 7.77 



Mean number of lamps, per indicated horse-power, using 50 lamps 8. 50 



Mean number of lamps, per indicated horse-power, using 70 lamps. 10. 11 



Mean number of lamps, per net horse-power, using 45 lamps 25. 00 



Mean number of lamps, per net horse-power, using 50 lamps. 27. 02 



Mean number of lamps, per net horse-power, using 70 lamps 24. 63 



Mean of the last three quantities 25. 55 



So far the greatest number of lamps in operation at any one time has 

 been (to the best of the writer's knowledge) 70, and he believes the 

 average number to be about 47. The number of lamps, per indicated 



