United States Naval Institute Proceedings, Томови 3-4U.S. Naval Institute, 1877 |
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Страница 58
... minutes and seconds according to the sexagesimal system . We also find methods for the extraction of the square and cube roots of any number , with the following practical application of the square root . " The knowledge of finding out ...
... minutes and seconds according to the sexagesimal system . We also find methods for the extraction of the square and cube roots of any number , with the following practical application of the square root . " The knowledge of finding out ...
Страница 65
... minutes , with a diopter or ruler working upon its central pin ; this ruler had a projection at either end , perpendicular to the plane of the instrument ; these were each pierced with two holes which served to di- rect the line of ...
... minutes , with a diopter or ruler working upon its central pin ; this ruler had a projection at either end , perpendicular to the plane of the instrument ; these were each pierced with two holes which served to di- rect the line of ...
Страница 67
... minutes ; the trausom was marked from 0 ° to 45 ° , and the yard from 45 ° to 90 ' . This graduation was made in the ratio of the tangent of the angle from 0 ° to 45 ° and of the cotangent from 45 ° to 90 ° ; although Blundevile says ...
... minutes ; the trausom was marked from 0 ° to 45 ° , and the yard from 45 ° to 90 ' . This graduation was made in the ratio of the tangent of the angle from 0 ° to 45 ° and of the cotangent from 45 ° to 90 ° ; although Blundevile says ...
Страница 68
... minutes , the least count being ten minutes . A diopter , reaching from limb to limb and turn- ing upon a pivot in the centre , was furnished at each extremity with a square plate perpendicular to the plane of the instrument ; these ...
... minutes , the least count being ten minutes . A diopter , reaching from limb to limb and turn- ing upon a pivot in the centre , was furnished at each extremity with a square plate perpendicular to the plane of the instrument ; these ...
Страница 70
... minutes of the equator : this was to be used in all latitudes which was of course greatly incorrect , for the distance given in this table was the departure : although the principle of changing departure into difference of longitude was ...
... minutes of the equator : this was to be used in all latitudes which was of course greatly incorrect , for the distance given in this table was the departure : although the principle of changing departure into difference of longitude was ...
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A. T. MAHAN altitude apparatus astrolabe barometer battery battle berth deck bilge boats boilers bore bottom breech breech-loader Cape Cape Horn Captain carbon cast cast-iron chart coast coil Commander compartment compass cylinder depth detonation diameter distance drum energy engine explosion fathoms feet fire fleet French friction Greytown groove gun deck gun-cotton hammock heat hole hundred fathoms inch instrument iron lake Nicaragua latitude length longitude means mercury meridian method miles motion muzzle NAVAL INSTITUTE navigation Navy Nicaragua oxygen passed phosphorus pipe piston port pounds preservation pressure projectile pulley pumps rear reel rifle rope Royal Navy sail screw shaft ship shot side sinker sounding sounding line spar steam steel studs tactics thousand fathoms tion triarii triremes tube turn Tuscarora U.S. NAVAL ACADEMY UNITED STATES NAVAL valve vessel weather wedge weight welding wind wire wood