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 This publication has a great deal of hitherto unpublished information.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, Magnetic Compass Deviation and Correction 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.