In 1804 , he became Gall 's full - time research partner .
In 1800 , Johann Spurzheim attended one of Gall 's public lectures and was hired as an assistant to help with public medical demonstrations .
In 1804 , Johann Spurzheim became Gall 's full - time research partner .
In 1800 , Johann Spurzheim attended one of Gall 's public lectures and was hired as an assistant to help with public medical demonstrations .