This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Sir William Crookes . William Crookes Sir William Crookes inventor of the Crookes tube an early type of experimental vacuum tube which produced colorful light displays Caption read ubi Crookes ibi lux which in Latin means roughly Where there is Crookes there is light Published in Vanity Fair May published May Creator Leslie