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Unspecified / 1921

A practical manual of the compass; a short treatise on the errors of the magnetic compass, with the methods employed in

A practical manual of the compass; a short treatise on the errors of the magnetic compass, with the methods employed in

The Smithsonian catalogs A practical manual of the compass; a short treatise on the errors of the magnetic compass, with the methods employed in as books in its Compass records.

Material from various sources originally compiled by Lieutenant Commander Harris Laning. cf. Pref.

SERENDIPITYA little unexpected
FamiliarWeird

The Smithsonian lists the object under Compass and dates it 1921.

Material from various sources originally compiled by Lieutenant Commander Harris Laning. cf. Pref.

Smithsonian InstitutionA practical manual of the compass; a short treatise on the errors of the magnetic compass, with the methods employed in

Original explanation based on the sources above. Images carry their own reuse terms.