Utilizing among others the inventions of Dr. C. W. Siemens, Mr. Charles G. Brush, of Cleveland, O., gave to the Avorld in 1875 his remarkably efficient dynamo or genera tor, and from that time the illumination of streets and squares by electricity began to be somewhat common.
The possibility of producing a brilliant light Avith this fluid had been Avell known to physicists ever since Sir Humphry Davy's experiments in 1813, but no method of generating the electricity cheaply had hitherto been invented.  Utilizing among others the inventions of Dr. C. W. Siemens, Mr. Charles G. Brush, of Cleveland, O., gave to the Avorld in 1875 his remarkably efficient dynamo or genera tor, and from that time the illumination of streets and squares by electricity began to be somewhat common.  There Avas, to be sure, another difficulty to be overcome, even for lighting on a gi'and scale, that of maintaining a stead}- and continuous light.