Coal (childhood) -- Graphite (coal mining) -- Blood (college) -- Mercury (industry + graduate school) -- Honey (love + marriage) -- Chalk (a young professor in Texas) -- Petroleum (research + the laboratory) -- Paper (what started the encyclopedia) -- Limestone (administration + the house on the lake) -- Air (piloting + policy) -- Piss and vinegar (reputation + retirement) -- Coffee (generosity + centenarianhood).