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A STORY LIVES FOREVER REGISTER SIGN IN Web of Stories offers you the chance to listen to some of the greatest people of our time telling their life stories. Editor's pick The most popular stories   The beginning of my career in cell cultures Gerald Fischbach - Scientist Then when I introduced microelectrodes from above, I actually was pretty skilled at preparing the microelectrodes. Which had to be done almost every day because the electrodes were very fine tip, so that they could penetrate the nerve and muscle cells without damaging them too much. When they were filled with a concentrated solution of KCl... KCl because that was the principal intracellular cation. They measured anywhere from 10 to 100 megaohms, so not only were they fine tip, but they're extremely high resistance, requiring very specialized amplifiers. Which I had learned a bit about back at Cornell because I met a man named Ernie Amatniak, who had a company making these amplifiers, providing them to some of the senior