1.The foregoing statement is quoted from Dr Urbitzkany’s work “Electricity in the Service of Man.”

2.Gravity does not enter, as a current is generated in lowering A.

3.Each segment is really only 115° in length but the brushes are set at a distance from the holder far enough to just reach over the five degree gap by the gauge above described.

4.An arc light is a light produced by the use of the voltaic arc, which is made by the sparks passing between two poles of a powerful battery which are brought together and then seperated a little.