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United States Navy Use Of Hydrometer 1800s
Certain ships of the United States Navy adopted the use of the hydrometer in the 1850s. Readings taken of the density of seawater contributed to research into the dynamics of ocean currents. Adoption The first International Maritime Conference held at Brussels in 1853 (aka "Brussels Conference") for devising a uniform system of meteorological observations at seaMaury, Matthew Fontaine, USN, 1853Brussels - First International Maritime Conference Held For Devising An Uniform System Of Meteorological Observations At Sea WikiSource recommended the systematic use of the hydrometer. 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 Henry Toynbee, (F.R.A.S., F.R.A.G.S) of the English East Indiaman ''Gloriana''. All of these men returned valuable observations with the hydrometer, though Captain Rodgers afforded the most extended series. Those ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrometer
A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity. A hydrometer usually consists of a sealed hollow glass tube with a wider bottom portion for buoyancy, a ballast such as lead or mercury for stability, and a narrow stem with graduations for measuring. The liquid to test is poured into a tall container, often a graduated cylinder, and the hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer correlates to relative density. Hydrometers can contain any number of scales along the stem corresponding to properties correlating to the density. Hydrometers are calibrated for different uses, such as a lactometer for measuring the density (creaminess) of milk, a saccharometer for measuring the density of sugar in a liqu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Density
Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematically, density is defined as mass divided by volume: : \rho = \frac where ''ρ'' is the density, ''m'' is the mass, and ''V'' is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically called specific weight. For a pure substance the density has the same numerical value as its mass concentration. Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure. To simplify comparisons of density across different s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seawater
Seawater, or salt water, is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, 35 ppt, 600 mM). This means that every kilogram (roughly one liter by volume) of seawater has approximately of dissolved salts (predominantly sodium () and chloride () ions). The average density at the surface is 1.025 kg/L. Seawater is denser than both fresh water and pure water (density 1.0 kg/L at ) because the dissolved salts increase the mass by a larger proportion than the volume. The freezing point of seawater decreases as salt concentration increases. At typical salinity, it freezes at about . The coldest seawater still in the liquid state ever recorded was found in 2010, in a stream under an Antarctic glacier: the measured temperature was . Seawater pH is typically limited to a range between 7.5 and 8.4. However, there is no universally accepted reference pH-scale for seawater and the difference between measurement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Current
An ocean current is a continuous, directed movement of sea water generated by a number of forces acting upon the water, including wind, the Coriolis effect, breaking waves, cabbeling, and temperature and salinity differences. Depth contours, shoreline configurations, and interactions with other currents influence a current's direction and strength. Ocean currents are primarily horizontal water movements. An ocean current flows for great distances and together they create the global conveyor belt, which plays a dominant role in determining the climate of many of Earth’s regions. More specifically, ocean currents influence the temperature of the regions through which they travel. For example, warm currents traveling along more temperate coasts increase the temperature of the area by warming the sea breezes that blow over them. Perhaps the most striking example is the Gulf Stream, which makes northwest Europe much more temperate for its high latitude compared to other areas at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Ruschenberger
William Samuel Waithman Ruschenberger (4 September 1807 in Cumberland County, New Jersey – 24 March 1895 in Philadelphia, Pennsylvania) was a surgeon for the United States Navy, a naturalist, and an author. Biography After attending schools in Philadelphia and New York Ruschenberger entered the United States Navy with the rank of surgeon's mate, on 10 August 1826. He graduated from the medical department of the University of Pennsylvania in 1830, and was commissioned as a naval surgeon on 4 April 1831. In 1836 he was posted aboard USS ''Peacock'', and accompanied the second mission of diplomatist Edmund Roberts to Muscat and Siam. He was subsequently fleet surgeon of the East India Squadron between 1835 and 1837. From 1840 to 1842 Ruschenberger was attached to the naval facility at Philadelphia, and then the Brooklyn Navy Yard hospital between 1843 and 1847. In 1849, he was elected as a member to the American Philosophical Society. He was again fleet surgeon of the East India ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Toynbee
Henry Toynbee FRAS FRGS (22 October 1819 – 29 March 1909) was an merchant sailor and an early meteorologist, whose career was dedicated to passing on his expertise. He introduced local weather-forecasting to the British Isles. Personal life Henry Toynbee was born in Heckington, Lincolnshire on 22 October 1819, and baptised there the next day. He was the sixth son of fifteen children of the wealthy land owner and farmer George Toynbee (1783–1865). George's first wife, and Henry's mother, was Elizabeth, née Cullen, (1785–1820). Henry's parents were married at Bracebridge, Lincolnshire, on 21 May 1811, by Licence. On 22 December 1854 Henry, aged 35, married 25-year-old Ellen Philadelphia Smyth (July 1828 – 1881), a daughter of Admiral William Henry Smyth. Her brothers were: * Sir Warington Wilkinson Smyth FRS, 24 August 1817 – 19 June 1890 * Charles Piazzi Smyth, 3 January 1819 – 21 February 1900 * General Sir Henry Augustus Smyth, 25 November 1825 – 18 September 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Gravity
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water (molecule), water at its densest (at ); for gases, the reference is air at room temperature (). The term "relative density" (often abbreviated r.d. or RD) is often preferred in scientific usage, whereas the term "specific gravity" is deprecation, deprecated. If a substance's relative density is less than 1 then it is less dense than the reference; if greater than 1 then it is denser than the reference. If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass. If the reference material is water, then a substance with a relative density (or specific gravity) less than 1 will float in water. For example, an ice cube, with a relative density of about 0.91, will float. A substance wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Vincennes (1826)
USS ''Vincennes'' was a 703-ton Boston-class sloop of war in the United States Navy from 1826 to 1865. During her service, ''Vincennes'' patrolled the Pacific, explored the Antarctic, and blockaded the Confederate Gulf coast in the Civil War. Named for the Revolutionary War Battle of Vincennes, she was the first U.S. warship to circumnavigate the globe. Built in Brooklyn ''Vincennes''—the first American ship to be so named—was one of ten sloops of war whose construction was authorized by Congress on 3 March 1825. She was laid down at New York in 1825, launched on 27 April 1826, and commissioned on 27 August 1826, with Master Commandant William Compton Bolton in command. First world cruise The ship set sail for the first time on 3 September 1826, from New York bound for the Pacific by way of Cape Horn. She cruised extensively in that ocean, visiting the Hawaiian islands in 1829 and made her way to Macau by 1830, under Commander William B. Finch. * Her return voyage was ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matthew Fontaine Maury
Matthew Fontaine Maury (January 14, 1806February 1, 1873) was an American oceanographer and naval officer, serving the United States and then joining the Confederacy during the American Civil War. He was nicknamed "Pathfinder of the Seas" and is considered a founder of modern oceanography. He wrote extensively on the subject and his book, ''The Physical Geography of the Sea'' (1855), was the first comprehensive work on oceanography to be published. In 1825, at 19, Maury obtained, through US Representative Sam Houston, a midshipman's warrant in the United States Navy. As a midshipman on board the frigate , he almost immediately began to study the seas and record methods of navigation. When a leg injury left him unfit for sea duty, Maury devoted his time to the study of navigation, meteorology, winds, and currents. He became Superintendent of the United States Naval Observatory and head of the Depot of Charts and Instruments. There, Maury studied thousands of ships' logs and cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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