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George Meade, The Life and Letters of George Gordon Meade, Major-General United States Army (ed. George Gordon Meade), chapter 3 (search)
se substructure should be neither wholly of masonry nor wholly of piles, but a combination of the two, with masonry for the foundation into which to set the piles. This would, on the one hand, he said, avoid the great first cost of lighthouses built wholly of masonry and, on the other, the perishableness of piles in contact with salt water and air. We shall see later that he changed his opinion as to the character of light-house best adapted to the region, and frankly confessed it. In August, 1853, we find him writing to Colonel Abert a most interesting account of Sand Key light-house, designed, all but the watch-room and lantern, by Civil-Engineer I. W. P. Lewis, of Boston. The description of the optical phenomena exhibited by the particular First Order Fresnel apparatus to be used in this light-house is noteworthy for its clearness of expression on a difficult subject, as it has the precision of a mathematical treatise. An interesting episode of light-house duty occurred in c