A new and easy method of finding the latitude on sea or land, : having two altitudes of the sun and the time elapsed between the two observations, measured by a watch or other time-keeper

You might also be interested in

• Image not available

  A guide to practical navigation: : containing the rules and methods of solving problems in the most practical manner; the simplest and most complete method for finding a ship's position at sea, as well as a thoroughly approved method of finding the latitude and longitude at the same instant of time by double altitudes

  Rare Books

  631447

• Image not available

  Navigation improv'd : being chiefly the method for finding the latitude, at sea as well as by land, by taking any proper altitudes together with the time between the observations : the whole made easy by a new trigonometrical rule : and the means how to refresh the air in the hold of a ship or of a Man of War, and how to measure the number of waves, that pass under a ship during any given time; in order to make a truer estimation of the ship's way : and to have likewise thereby a sort of time-keeper

  Rare Books

  762154

• Image not available

  An explanation of the nature of equation of time, and use of the equation table for adjusting watches and clocks to the motion of the sun. Also the description of a time-keeper, for astronomical and other uses

  Rare Books

  83344

• Image not available

  A new set of logarithmic solar tables, : calculated and constructed for determining the latitude at sea, by taking two altitudes of the sun, with the intermediate time, by a common watch; and that with ease and accuracy, independent of the sun's meridional altitude. This most excellent and useful performance, not only produces the true latitude at any time between nine o'clock in the morning, and three in the afternoon; but also gives the true time of the day, when the greatest altitude was taken, to twenty seconds; and if greater accuracy is required, proportional parts may be taken. Whence the sun's azimuth may be determined by one single proportion. To which is added, a complete theory, illustrating the rationale of this most useful discovery

  Rare Books

  624403

• Image not available

  The art of dialling : by a new, easie, and most speedy way. Shewing, how to describe the houre-lines upon all sorts of plaines, howsoever, or in what latitude soever scituated: as also, to find the suns azimuth, whereby the sight of any plaine is examined. Performed by a quadrant, fitted with lines necessary to the purpose

  Rare Books

  59528

• Image not available

  A new theoretical and practical treatise on navigation : in which the auxiliary branches of mathematics and astronomy, comprised of algebra, geometry ... variation of the compass, etc., are treated of. Also the theory and most simple methods of finding time, latitude, and longitude ... Together with a new and easy plan for finding diff. lat., dep., course, and distance

  Rare Books

  250607