“In the higher reasoning which can only come from long study and experiment, imagination is necessary to supply temporarily gaps caused by absence of facts. Imagination is the backbone of the scientific mind. Marconi had to imagine wireless telegraphy before he accomplished it. It is the same with the telephone, the telegraph, the steam engine and those scores of commonplace marvels which are a part of our everyday life.
“The higher scientific mind is, perforce, the mind of a logician. It must possess imagination to a remarkable extent. For instance, science proved that all matter is composed of atoms — the molecular theory. Having proven this, scientific imagination saw that it was possible that atoms were themselves composed of more minute atoms, and sought to prove this. It did so.
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