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Hydrostatic Bubbles
Hydrostatic bubbles, also known as philosophical bubbles, gravity beads, aerometrical beads and hydrometer beads, are a type of hydrometer invented in 1757 by Alexander Wilson of Glasgow. The design was subsequently improved and patented by the glassblower and instrument maker Isabella Lovi of Edinburgh in 1805. The instrument, which consists of a set of glass beads, seems to have been particular to Scotland and was only used (for example, in determining the density of spirits) until the early 19th century, when it was largely superseded by more accurate methods. Operating principle In Lovi's version of the instrument, a set of hollow glass beads was created, each differing in density from the next by 0.002 units. When added to a liquid of unknown density, the beads that were more dense than the liquid sank, and those that were less dense than the liquid floated. The density of the liquid was indicated as falling between the density of the least dense bead that sank, and the mo ... [...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] |
Alexander Wilson (astronomer)
Alexander Wilson (171416 October 1786) was a Scottish surgeon, type-founder, astronomer, mathematician and meteorologist. He was the first scientist to use kites in meteorological investigations. In 1784, his son Patrick Wilson succeeded him as Regius Professor of Practical Astronomy at the University of Glasgow. Early life Wilson was born in St Andrews, Fife, the son of Patrick Wilson, the town clerk. Alexander was educated at the University of St Andrews, graduating in 1733, aged 18, with an MA. He was first apprenticed to a physician in St Andrews where he became skilled in constructing mercury thermometers in glass. In 1737, he left for London to make his fortune, He found work as assistant to a French surgeon-apothecary, which included caring for his patients. During this time he was introduced to Lord Isla who like Wilson was interested in astronomy, and Wilson constructed instruments for Isla during 1738. After visiting a type foundry with a friend in London, he h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glasgow
Glasgow ( ; sco, Glesca or ; gd, Glaschu ) is the most populous city in Scotland and the fourth-most populous city in the United Kingdom, as well as being the 27th largest city by population in Europe. In 2020, it had an estimated population of 635,640. Straddling the border between historic Lanarkshire and Renfrewshire, the city now forms the Glasgow City Council area, one of the 32 council areas of Scotland, and is governed by Glasgow City Council. It is situated on the River Clyde in the country's West Central Lowlands. Glasgow has the largest economy in Scotland and the third-highest GDP per capita of any city in the UK. Glasgow's major cultural institutions – the Burrell Collection, Kelvingrove Art Gallery and Museum, the Royal Conservatoire of Scotland, the Royal Scottish National Orchestra, Scottish Ballet and Scottish Opera – enjoy international reputations. The city was the European Capital of Culture in 1990 and is notable for its architecture, cult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isabella Lovi
Isabella may refer to: People and fictional characters * Isabella (given name), including a list of people and fictional characters * Isabella (surname), including a list of people Places United States * Isabella, Alabama, an unincorporated community * Isabella, California, a former settlement * Lake Isabella, California, a man-made reservoir * Isabella, Georgia, an unincorporated community * Isabella County, Michigan * Isabella, an unincorporated community in Isabella Township, Michigan * Isabella, Minnesota, an unincorporated community * Isabella, Missouri, an unincorporated community * Isabella River (Minnesota) * Isabella, Oklahoma, a census-designated place and unincorporated community * Isabella, Pennsylvania (other) * Isabella Furnace, a cold-blast charcoal iron furnace, Pennsylvania Elsewhere * Isabella River (New South Wales), Australia * Isabella Island, Tasmania, Australia * Isabela Island (Galápagos) * Isabella, Manitoba, Canada, a settlement * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edinburgh
Edinburgh ( ; gd, Dùn Èideann ) is the capital city of Scotland and one of its 32 Council areas of Scotland, council areas. Historically part of the county of Midlothian (interchangeably Edinburghshire before 1921), it is located in Lothian on the southern shore of the Firth of Forth. Edinburgh is Scotland's List of towns and cities in Scotland by population, second-most populous city, after Glasgow, and the List of cities in the United Kingdom, seventh-most populous city in the United Kingdom. Recognised as the capital of Scotland since at least the 15th century, Edinburgh is the seat of the Scottish Government, the Scottish Parliament and the Courts of Scotland, highest courts in Scotland. The city's Holyrood Palace, Palace of Holyroodhouse is the official residence of the Monarchy of the United Kingdom, British monarchy in Scotland. The city has long been a centre of education, particularly in the fields of medicine, Scots law, Scottish law, literature, philosophy, the sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquor
Liquor (or a spirit) is an alcoholic drink produced by distillation of grains, fruits, vegetables, or sugar, that have already gone through alcoholic fermentation. Other terms for liquor include: spirit drink, distilled beverage or hard liquor. The distillation process concentrates the liquid to increase its alcohol by volume. As liquors contain significantly more alcohol (ethanol) than other alcoholic drinks, they are considered 'harder'; in North America, the term ''hard liquor'' is sometimes used to distinguish distilled alcoholic drinks from non-distilled ones, whereas the term ''spirits'' is more common in the UK. Some examples of liquors include vodka, rum, gin, and tequila. Liquors are often aged in barrels, such as for the production of brandy and whiskey, or are infused with flavorings to form a flavored liquor such as absinthe. While the word ''liquor'' ordinarily refers to distilled alcoholic spirits rather than beverages produced by fermentation alone, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galilean Thermometer
A Galileo thermometer (or Galilean thermometer) is a thermometer made of a sealed glass cylinder containing a clear liquid and several glass vessels of varying density. The individual floats rise or fall in proportion to their respective density and the density of the surrounding liquid as the temperature changes. It is named after Galileo Galilei because he discovered the principle on which this thermometer is based—that the density of a liquid changes in proportion to its temperature. History Although named after the 16th–17th-century physicist Galileo, the thermometer was not invented by him. alileo did invent a thermometer, called Galileo's air thermometer (more accurately called a thermoscope), in or before 1603.] The instrument now known as a Galileo thermometer was invented by a group of academics and technicians known as the Accademia del Cimento of Florence, who included Galileo's pupil, Torricelli and Torricelli's pupil Viviani. Details of the thermometer were p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laboratory Equipment
A laboratory (; ; colloquially lab) is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed. Laboratory services are provided in a variety of settings: physicians' offices, clinics, hospitals, and regional and national referral centers. Overview The organisation and contents of laboratories are determined by the differing requirements of the specialists working within. A physics laboratory might contain a particle accelerator or vacuum chamber, while a metallurgy laboratory could have apparatus for casting or refining metals or for testing their strength. A chemist or biologist might use a wet laboratory, while a psychologist's laboratory might be a room with one-way mirrors and hidden cameras in which to observe behavior. In some laboratories, such as those commonly used by computer scientists, computers (sometimes supercomputers) are used for either simulations or the analysis of data. Scien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laboratory Glassware
Laboratory glassware refers to a variety of equipment used in scientific work, and traditionally made of glass. Glass can be blown, bent, cut, molded, and formed into many sizes and shapes, and is therefore common in chemistry, biology, and analytical laboratories. Many laboratories have training programs to demonstrate how glassware is used and to alert first–time users to the safety hazards involved with using glassware. History Ancient era The history of glassware dates back to the Phoenicians who fused obsidian together in campfires making the first glassware. Glassware evolved as other ancient civilizations including the Syrians, Egyptians, and Romans refined the art of glassmaking. Mary the Jewess, an alchemist in Alexandria during the 1st century AD, is credited for the creation of some of the first glassware for chemical such as the ''kerotakis'' which was used for the collection of fumes from a heated material. Despite these creations, glassware for chemical us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Density Meters
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 systems of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scottish Inventions
Scottish inventions and discoveries are objects, processes or techniques either partially or entirely invented, innovated, or discovered by a person born in or descended from Scotland. In some cases, an invention's Scottishness is determined by the fact that it came into existence in Scotland (e.g., animal cloning), by non-Scots working in the country. Often, things that are discovered for the first time are also called "inventions" and in many cases there is no clear line between the two. The Scots take enormous pride in the history of Scottish invention and discovery. There are many books devoted solely to the subject, as well as scores of websites listing Scottish inventions and discoveries with varying degrees of science. Even before the Industrial Revolution, Scots have been at the forefront of innovation and discovery across a wide range of spheres. Some of the most significant products of Scottish ingenuity include James Watt's steam engine, improving on that of Thomas N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
