1851 Great Exhibition: Official Catalogue: Class VIII.: E. Lyon Berthon
From Graces Guide
104. BERTHON, Rev. E. LYON, Fareham, Hants — Inventor.
Patent perpetual log, for indicating the speed and leeway of ships. Its novelty consists in the compensation, by which disturbing causes are neutralized.
Patent clinometer, for showing the list and trim of ships.
Collapsible life-boat, combining strength and capacity within small limits of stowage. The act of lowering expands, and of raising collapses it; when open it contains a great volume of air in its longitudinal cells.
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