Complex sentence: Hodgkin was not convinced this was a good solution, and was proven correct when Whitaker built their first version of such a system in November, but found that the two motions caused enormous vibrations in the entire system.
Split into simpler sentences: Hodgkin was not convinced this was a good solution and was proven correct when Whitaker built their first version of such a system in November. They found that the two motions combined to cause enormous vibrations in the entire system.