Mudcat Café message #2203787

The Mudcat Café ^TM
Thread #106596 Message #2203787
Posted By: GUEST,clockwatcher
28-Nov-07 - 07:50 AM
Thread Name: Charles Wheatstone BBC Radio 4
Subject: RE: Charles Wheatstone BBC Radio 4

I believe he also invented the rheostat, which was used more or less unchanged in railway signalling well into the mid 20th century.