In addition to dealing with the properties of magnets and the earth's magnetism, three chapters are devoted to the magnetism of the ship, the third explaining in detail the reason for, and composition of, the "nine rods". The relation of the components P, Q and R and the rods to the various coefficients are fully explained. This publication has a great deal of hitherto unpublished information.

There are about 70 diagrams, a few in colour, to simplify the matter in the text.


CHAPTER CONTENTS :--

Definitions of Terms
Tables of Symbols and their Meanings
Table of Formulae and Laws Introduction
Space and Vector Diagrams
Parallelogram and Triangle of Forces
Trigonometrical Ratios
Magnetism
General
Fundamental Facts of Magnetism
The Earth's Magnetism
Magnetic Measurements
The Ship's Magnetism
Preliminary
The Ship's Permanent Magnetism
The Ship's Induced Magnetism
The Theory of the Deviations of the Compass
Transformation of Equations (4) and (5)
Deviations in Terms of the Compass Course
Healing Error
Analysis of Deviations
Theory of the Mechanical Correction of the Compass
The Mechanical Correction of the Compass. Worked Examples.


In addition to Compass Adjusters, the book will be of invaluable assistance to Lecturers and Teachers, Candidates for Certificates of Competency as Extra Master and Master and others interested in the subject.

It is the standard work and is also used in the Examination Rooms.