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Maury had the privilege of continuing his studies ashore in New York and Washington for several months before he embarked on his next cruise. He was then preparing himself for the examination for the rank of passed midshipman. This examination covered the following subjects: Bowditch’s “Navigation”; Playfair’s “Euclid”, Books 1, 2, 3, 4, and 6; McClure’s “Spherics”; Spanish or French; Mental and Moral Philosophy; Bourdon’s “Algebra”; and Seamanship. The time devoted to each midshipman by the examiners, in the order of his appointment, ranged from fifty minutes to two hours. To judge from the questions in seamanship, the examination was largely of a very practical nature,—on how to handle the sails of a ship and how to navigate her.

In his examination, Maury passed twenty-seven in a class of forty. An explanation of this apparently low standing may be gathered from the following account of the manner of conducting such examinations: “The midshipman who seeks to become learned in the branches of science that pertain to his profession, and who before the Examining Board should so far stray from the lids of Bowditch as to get among the isodynamic and other lines of a magnetic chart, would be blackballed as certainly as though he were to clubhaul a ship for the Board in the Hebrew tongue.... Midshipmen, turning to Bowditch, commit to memory the formula of his first or second method for ‘finding the longitude at sea by a lunar observation’. Thus crammed or ‘drilled’, as it is called, they go before the Board of Examination, where, strange to say, there is a premium offered for such qualification. He who repeats ‘by heart’ the rules of Bowditch, though he does not understand the mathematical principles involved in one of them, obtains a higher number from the Board than he who, skilled in mathematics, goes to the blackboard and, drawing his diagram, can demonstrate every problem in navigation”.[2] Maury, no doubt, wrote this out of his own personal experience; and even though the results of his examination may have indicated that in the ordinary duties of his profession he was not above the average, still it was to be in a special field of the service that his genius was to display itself.