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 the powerfully developed curiosity of the explorer and the inventor, ever busily prying into the causes of things, ever speculating upon the consequences of novel combinations. His native inquisitiveness had been stimulated by a young civilization's manifold necessities, mothering manifold inventions, and had been supplemented by a certain moral and idealizing passion for improvement. The practical nature of many of his devices, his absorption in agriculture and navigation, his preoccupation with stoves and chimneys, the image of him firing the gas of ditch water or pouring oil on troubled waves, and the celebrity of the kite incident rather tend to fix an impression that he was but a tactful empiricist and a lucky dilettante of discovery. It is interesting in this connection to note that he confesses his lack of patience for verification. His prime scientific faculty, as he himself felt, was the imagination which bodies forth the shapes and relations of things unknown, which constructs the theory and the hypothesis. His mind was a teeming warren of hints and suggestions. He loved rather to start than to pursue the hare. Happily what he deemed his excessive penchant for forming hypotheses was safeguarded by his perfect readiness to hear all that could be urged against them. He wished not his view but truth to prevail—which explains the winsome cordiality of his demeanor towards other savants. His unflagging correspondence with investigators, his subscription to learned publications,