Abstract
THE perfilograph is an ingenious instrument for recording graphically the undulations of the bottom of a channel in depths up to about six or seven fathoms. It is the invention of Augustus Mercau, an Argentine engineer, by whom a paper was read at Buenos Aires before the Naval Section at the recent meeting of the International American Scientific Congress, in the course of which the instrument was fully described. The principles on which its construction depends and the practical results obtained from its use appear to present some points of interest.
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F., A. The Perfilograph . Nature 84, 434–435 (1910). https://doi.org/10.1038/084434a0
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DOI: https://doi.org/10.1038/084434a0