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Pneumatic Trough
A pneumatic trough is a piece of laboratory apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen. It is mainly made of glass or various fibres and are of various sizes. It was invented by Stephen Hales. Description Four items are required for gas collection with a pneumatic trough: * The trough itself, which is a large glass dish or a similar container. * A gas bottle (or bulb), to hold the gas collected. * A way to support the gas bottle or bulb, such as a beehive shelf or a hanger (as with Stephen Hales' design). * A liquid in the trough. Liquid Pneumatic troughs require a liquid such as water. Scientists also have used mercury in pneumatic troughs, but usually only for the collection of water-soluble gases. Health and safety issues surrounding mercury generally prohibit its use in modern-day pneumatic troughs. Usage The bottle is filled with water, inverted, and placed into the pneumatic trough already containing water. The outlet tube from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Hales Stephen Trough Detail
Hales is a village and civil parish in the England, English county of Norfolk. Hales is located south-east of Loddon, Norfolk, Loddon and south-east of Norwich. History Hales' name is of Anglo-Saxons, Anglo-Saxon origin and derives from the Old English for nooks of land. In the Domesday Book, Hales is listed as a settlement of 54 households in the Hundred (county division), hundred of Clavering. In 1086, the village was divided between the estates of Roger Bigod of Norfolk, Roger Bigod, Godric the Steward, Bury St Edmunds Abbey, St Edmunds Abbey and Ralph Baynard. Hales Hall was built in 1478 by James Hobart, Sir James Hobart, the Attorney General of King Henry VII. Hobart acquired the estate from Sir Roger de Hales, whose daughter had married the Duke of Norfolk. In 1666, the last Hales heiress was Lady Dionysia Williamson, who left her estate to her nephew, John Hoskins. In 1957, two Gloster Meteor, Gloster Meteors of No. 74 Squadron RAF crashed in Hales after a mid-ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
