The Welfare of Animals Part ppsx

The Philosophy of Vacuum Part 13 ppsx

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The Philosophy of Vacuum Part 17 ppsx

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The Philosophy of Vacuum Part 19 ppsx

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An Encyclopedia of the History of Technology part 11 ppsx

... the end of the eighteenth century. PART ONE: MATERIALS84lead, and then in 1687 to the refining of copper. John Carter, a protégé of Clarke, subsequently went into partnership with a group of ... as the centre of copperand brass production in 1763. In the autumn of that year, Charles Roe of the Macclesfield Copper Company first sensed the possibilities of the copper oredeposits of Parys ... bought the rights to minecalamine and make brass for the sum of £50 per annum. The factory they setup at Isleworth, west of London, made brass of excellent quality for a number of years under the...

An Encyclopedia of the History of Technology part 14 ppsx

... lighter than the electrolyte, floats to the surface of the bath where it must be collected without shorting the electrodes. Furthermore, the gas liberated at the anode is chlorine rather than the oxygen ... 708°C, the melting point of the chloride. Thisaccumulated as a liquid in the base of the reactor, and was transferred, still in the molten state, to the electrolytic cells. Since 1930 most of the ... One of the directors appointed at this time was William Matther who also acted aschief engineer of the company. At a later stage, as Sir William Matther, heheaded the well-known firm of Matther...

An Encyclopedia of the History of Technology part 24 ppsx

... other by the now celebrated equation E=mc2, where E is the energy, m the mass and c the velocity of light. After the work of Frederick Soddy and Ernest Rutherfordduring the first decade of ... orbits, a number of electrons equal to the number of protons. The latter is the atomic number and determines the chemical identity of the element. The number of protons and neutrons is the mass number.Atoms ... 217).Nuclear energy The possibility of using the energy locked up in the atomic nucleus is the direct result of research into the nature of matter, stemming ultimately from the speculations of the materialist...

An Encyclopedia of the History of Technology part 36 ppsx

... course of the working cycle of the engine. Second, the nomenclature is applicable to the steam engine,because the combustion in the furnace of the steam engine is external to the engine. Third, the ... version of the latter engine, the W2B, became the basis of the American version of the Whittle engine, the IA,which was built by the General Electric Company at Lynn, Massachusetts. PART TWO: ... installed at the Marcus Hook, Pennsylvania, refinery of the Sun Oil Company.While these applications of the gas turbine did not involve the production of useful amounts of work, the knowledge...

An Encyclopedia of the History of Technology part 51 ppsx

... At the top of the slope the wedge of water makes a levelwith the surface in the upper pound and the gate which holds back the upperpound falls under the pressure of the wedge. To propel the ... passing the locks, soin the 1960s two new lengths of canal were built, one at the level of the canal below the lowest lock and the other at the level above the highestlock. Linking the two ... one linking the Saône and the Loire and the other Garonne and the Mediterranean.By the end of the sixteenth century the growing demands of Paris for food,plentifully available in the Loire valley,...

An Encyclopedia of the History of Technology part 52 ppsx

... exploited in the valley. The nobility of Kleve, part of the domains of the Elector of Brandendurg, persuaded the Elector to allow the canalization of the Ruhr in order to supplement the shortage of supplies ... locks to the level of the Elbe-Havel Canal.Yet another east-west link was completed in the north in 1935 with the construction of the Küsten Canal between the Ems at Dörpen via Oldenburgto the river ... the many minor ones.Following the Treaty of Vienna in 1815, what is now Belgium, the Netherlands and Luxembourg were united under William I of the Netherlands. He recognized the importance of...

An Encyclopedia of the History of Technology part 54 ppsx

... whoclosed the western canal in 1863 and most of the remainder by the end of the century. Most of the other canals between the Ohio and the eastern seaboardhad also succumbed to the thrust of the railways.All ... one valley to another the highest part of the canal is called the summit level. Into this generally run the feeders which supply the principal water for the locks on both sides of the ridgeTide ... which the canal boats were carried to the summit of the ridge at yoom (2300ft) and then the line descended by five more planes toJohnstown on the western side of the range. The cradles on the...

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