New American Practical NavigatorU.S. Government Printing Office, 1821 |
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Strona 3
... obtained in other cases . EXAMPLE VI . Required the value of 3.25 yards . 3.25 3 EXAMPLE VII . Required the value of 7.281 days . 7.231 24 .75 12 9.00 Answer 3 yards , 0 feet , 9 inches , 924 462 5.544 60 32.640 60 38.400 Answer 7 days ...
... obtained in other cases . EXAMPLE VI . Required the value of 3.25 yards . 3.25 3 EXAMPLE VII . Required the value of 7.281 days . 7.231 24 .75 12 9.00 Answer 3 yards , 0 feet , 9 inches , 924 462 5.544 60 32.640 60 38.400 Answer 7 days ...
Strona 14
... obtain ( from art . 54 ) the following analogies . CD : cd :: FD : fd ; CD : cd : ; BD : bd ; CB : cb :: BE : be , & c . LVI . A E H B Let ABD be a quadrant of a circle , described by the ra- dius CD , BD any arch of it , BA its ...
... obtain ( from art . 54 ) the following analogies . CD : cd :: FD : fd ; CD : cd : ; BD : bd ; CB : cb :: BE : be , & c . LVI . A E H B Let ABD be a quadrant of a circle , described by the ra- dius CD , BD any arch of it , BA its ...
Strona 30
... as are equal to the index subtracted from 9 , the decimal point being placed to the left standing opposite to 336 ; now the index being 1 of these ciphers ; in this mauner you will obtain the sought number . 30 LOGARITHMS .
... as are equal to the index subtracted from 9 , the decimal point being placed to the left standing opposite to 336 ; now the index being 1 of these ciphers ; in this mauner you will obtain the sought number . 30 LOGARITHMS .
Strona 32
... obtain the fourth number sought . To obtain the same result by logarithms , we must add the logarithms of the se- cond and third numbers together , and from the sum subtract the logarithm of the first number , the remainder will be the ...
... obtain the fourth number sought . To obtain the same result by logarithms , we must add the logarithms of the se- cond and third numbers together , and from the sum subtract the logarithm of the first number , the remainder will be the ...
Strona 64
... obtain the following theorems . THEOREM I. The circumference of the equator is to the circumference of any other paral- lel of latitude , as radius is to the co - sine of that latitude . THEOREM II . As the length of a degree of the ...
... obtain the following theorems . THEOREM I. The circumference of the equator is to the circumference of any other paral- lel of latitude , as radius is to the co - sine of that latitude . THEOREM II . As the length of a degree of the ...
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Kluczowe wyrazy i wyrażenia
2Cor a-back a-head a-lee Aldebaran anchor angle apparent altitude arch azimuth bearing and distance brace cable calculated Cape centre Co-secant Co-sine Co-tang column compass Corr correction corresponding course and distance degrees Degs Diff difference of latitude difference of longitude Dist equal error EXAMPLE feet Funchal given Greenwich haul head sails heave horizon glass HourA.M larboard Latitude and Departure lee-way line of numbers logarithm mast mean meridian meridian altitude method middle latitude miles mizen moon moon's multiplied N.sine Nautical Almanac nearly noon observed altitude parallax parallel perpendicular plane Plane Sailing radius refraction rope rule sails sea account Secant semi-diameter sextant ship ship's side sine square star star's staysail subtracted sun's declination sun's right ascension tack taken Tangent tide topsails TRAVERSE TABLE triangle true distance tude variation veer wind windward zenith distance
Popularne fragmenty
Strona 2 - In any triangle, the sum of the three angles is equal to two right angles, or 180°.
Strona 104 - ... or taking their difference when of contrary names ; the altitude to be reckoned from the south point of the horizon, when the latitude is north, and the contrary when south ; but when the sum exceeds 90°, it is to be taken from 180°...
Strona 166 - To find the solidity of a pyramid and of a cone. RULE. — Multiply the area of the base by one third of its altitude, and the product will be its solidity.
Strona 185 - The cause of the. tides is the unequal attraction of the sun and moon upon different parts of the earth. . For they attract the parts of the earth's surface nearest to them, with a greater force than they do its centre : and attract the centre more than they do the opposite surface. To restore this equilibrium the waters take a spheroidal figure, whose longer axis is directed towards the attracting luminary.
Strona 24 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Strona 186 - ... the miles the current sets per hour, and the bearing of the log will show the set of it. There is a very remarkable current, called the GULF STREAM, which sets in a north-east direction along the coast of America, * From Nathaniel Bowditch, THE NEW AMERICAN PRACTICAL NAVIGATOR, E.
Strona 9 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Strona 292 - In spherical triangles, whether right angled or oblique angled, the sines of the sides are proportional to the sines of the angles opposite to them.
Strona 167 - If the vessel be double-decked, take the length thereof from the fore part of the main stem, to the after part of the stern post, above the upper deck ; the breadth thereof at the broadest part above the main wales...