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Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 Excerpt: ...for the computation of the meridional parts, and verify the preceding result by it. Honours, 1877.. Ex. 317 Explain clearly what is meant by a ' sailing.' Write down the characteristic formula of ' Mercator's sailing,' and prove it. Describe the table used in connection with this sailing. A. 1878. Ex. 318. Write down the characteristic formulae for finding difference of longitude--(11 in middle-latitude sailing; (2) in Mercator's sailing. Which gives the more accurate result if the course and distance are considerable 1 Why? On what principle is the table of meridional differences of latitude calculated 1 A. 1881. Ex. 319. Show, on the supposition that the earth is a sphere, that the meridional parts for any latitude may be calculated from the formula, log mer. parts = 3-8984895 + log (log cot £ co-lat.-10). In what respect does this formula require to be modified if the spheroidal form of the earth is taken into account 1 Calculate the meridional parts for lat. 51 50' N. Honours, 1881. Ex. 320. What do you mean by the angle of the vertical and by the reduced latitude 1 Draw a figure illustrating your answer. What is the reduced latitude for Paris observatory, in latitude 48 50' 13' X.? CHAPTER VIII. Great circle sailing--Shortest distance--Definitions--Data employed--Formulae proved for course--Distance--Position of vertex and succession of points--Additional formulae for the distance, &c.--Composite sailing--Circular arc sailing--Great circle charts or the Gnomonic Projection--Windward great circle sailing--How a terrestrial globe should be used for the solution of the question--Exercises--Examination. GREAT-CIRCLE SAILING. Steam vessels are so fast supplanting sailing vessels that a very large proportion of the ocean trade is now carried on by t...Book Details
Published
May 1, 2012
Publisher
RareBooksClub.com
Pages
84
Format
Paperback
ISBN
9781231315903