Geiger Counter – 1908 - Magnet Academy

Counting alpha particles was tedious and time-consuming work, until Hans Geiger came up with a device that did the job automatically.

How fast were the alpha particles going when Rutherford did his gold foil experiment? - Quora

Leyden Jars – 1745 - Magnet Academy

Museum - Magnet Academy

Geiger Black and White Stock Photos & Images - Alamy

Sears

How do Geiger counters work? - Explain that Stuff

Almanac: The inventor of the Geiger Counter - CBS News

This Month in Physics History

Geiger Counter