Unfortunately, when he tried it on Garfield, it didn’t work. It may have failed because there was a mattress made of metal underneath the cloth one, that might/may have created too much interference for the machine. Sadly, many of Bell’s scientific contemporaries heard of his failure and laughed at him. I learned of this event by reading the endnotes of the time travel story, Master of Sound.
Read the complete review at TIME TRAVEL TIMES TWO.