United States Navy use of Hydrometer 1800s

United States Navy Use Of Hydrometer 1800s

United States Navy use of Hydrometer 1800s

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Maury, Matthew Fontaine, USN, 1853 -- Brussels -- First International Maritime Conference Held For Devising An Uniform System Of Meteorological Observations At_Sea. The first International Maritime Conference held at Brussels in 1853 (aka "Brussels Conference") for devising a uniform system of meteorological observations at sea -- August and September -- (Official Report on WikiSource) recommended the systematic use of the hydrometer at sea. Captain John Rodgers, Lieutenant Porter, and Dr. William Samuel Waithman Ruschenberger, all of the United States Navy did this as did Dr. Raymond, in the American steamer Golden Age, and Captain Toynbee, (F.R.A.S., F.R.A.G.S) of the English East Indiaman the Gloriana. All of these men returned valuable observations with the hydrometer. Captain Rodgers afforded the most extended series. Those navigators who used the hydrometer systematically, carefully, and quietly enlarged the bounds of our knowledge and fields of research. Those observations led to the discovery of new relations of the sea. In the physical works of the universe there was no compensation to be found that is more exquisite or beautiful than that which, by means of this little instrument, has been discovered in the sea between its salts, the air, and the sun.

The observations made with it by Captain Rodgers, on board the Vincennes, (first United States warship to circumnavigate the globe) showed that the specific gravity of sea water varies but little in the...
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