file:epstein_experiment_jpg
A figure from publication by Josef Epstein about electrical engineering (illustrating an experiment about polarity of direct current).
epstein_experiment.jpg
This is copy of an image which was published in 1891 and it is therefore in the Public Domain.
file/epstein_experiment_jpg.txt · Last modified: 2023/06/17 22:18 by 127.0.0.1