Any thought why a Geiger counter is so called , when it does not count geigers ?

 

It was named after Hans Geiger, a German scientist, who worked on detecting radiation in the early 1900s. Walter Mueller, a graduate PhD student of Geiger's, perfected the gas-sealed detector in the late 1920s and received credit for his work when he gave his name to the Geiger-Mueller tube.

 

Google seems to be able to answer:

 

Google seems to be able to answer:
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Thank you
it floated through my head and I typed before I thought to google

Thanks