But when he goes out to slay, he carries a marvel of mechanism that lets loose at the touch of his finger all the hidden molecular energies, and leaves the javelin, the arrow, the blowpipe of his fathers far behind.
There are no more uses of "molecule" in the book.
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They say they can genetically engineer bacteria or yeast to produce whatever molecules they need to replace gasoline.
That protein molecule is found in lower concentrations in the brains of people suffering ordinary age-related memory loss.