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Updated: June 7, 2025
The province of Caracas possesses fine salt-works at Los Roques; those which formerly existed at the small island of Tortuga, where the soil is strongly impregnated with muriate of soda, were destroyed by order of the Spanish government. A canal was made by which the sea has free access to the salt-marshes.
Muriate of Potash 30 cost 2 6 Common Salt 28 " 0 3 Burned Plaster of Paris 34 " 0 6 Bone-Dust 54 " 3 3 Epsom Salts 56 " 4 0 10 6 It has been ascertained by the microscope that wool, cotton, hemp, jute, and flax are composed of minute fibres, each of which forms a hollow tube, and there is a close resemblance between the tubes of each, the tube of the cotton, however, collapsing as it ripens.
Most of these substances, however, exist in comparatively small quantity in the sea, with the exception of muriate of soda, or common table salt; of which, as all bathers know from bitter experience, there is a very considerable quantity. The quantity of silver contained in sea water is very small indeed.
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