Vol. IV, No. 2

Front Matter

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A. P. Niblack

International cooperation in maritime matters

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Regulations governing the organization of the Hydrographic Service of the Argentine Republic

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Hydrographic Service of the Japanese Imperial Navy

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The Hydrographic Survey of the Netherlands East Indian Archipelago

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Charts of the progress of Hydrography of the British Isles and Sweden

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Use of Aircraft for Surveying

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L. Tonta

On the curvature of the lead line and the correction for its inclination

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P. De Vanssay De Blavous

Ellipsoids and Tables

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L. Tonta

Submarine phonotelemetry: A new radio-acoustic position line

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Sound ranging, with reference to ultra-sonic parasitic noises

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The towed sounder used by the conservancy department of the Naval Yard at Wilhelmshaven and the experiments made therewith

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The Kuhlmann submarine or high sea tide gauge

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Eric Pellerin

Compensator for submarine pressures

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Experiments relative to visibility of buoyage

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W. G. Perrin

The prime meridian

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L. A. Kaiser

How North Atlantic steamer tracks may be made safer and simpler

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J. L. Rannie

Excessive cases of lateral refraction

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I. Extracts and reviews

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II. Books of reference

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III. Documentary Bibliography

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