Col legno (Italian for with the wood) is a method of playing bowed string instruments (particularly the violin, viola, cello and double bass) whereby the strings are struck with the wood of the bow rather having the hair pulled across them.
... and Phil Lesh, and in 1967 - the band's breakthrough year - another percussionist, Mickey Hart.
Playing originally as The Warlocks, and later "The Grateful Dead", they ...