This edition emphasizes hands-on instruction for observers using precision instruments. It explains the why behind each step and aims to bring uniformity to field work, whether on land, at sea, or in a magnetic observatory.

How to measure declination, dip, and horizontal intensity using standard instruments.
Step-by-step procedures for dip observations, instrument adjustment, and polarity reversal.
Techniques for establishing the magnetic meridian and reading calculations for related quantities.
Practical notes on instrument care, field setup, and data reduction to iso-magnetic charts.

Ideal for readers who want a practical, foundational guide to magnetic measurements and the work of magnetic surveys.

"About this title" may belong to another edition of this title.

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