An Encyclopedia of the History of Technology part 8 ppt

... 87 6 Romans 18 baths and sanitation 9 18 brass and zinc artefacts 75 bridges 19, 462–3 building and architecture 19–20, 85 6, 85 9, 86 8, 87 3, 87 5, 87 6, 87 9 80 , 88 5, 88 7 8, 88 9 canals 475–6, 490 central ... INDEX OF TOPICS 1055 roller mill (corn) 257 roller printing (textiles) 83 5 rolling mills 28, 152, 180 , 381 Roman cement 88 8, 88 9 Roman mill 19, 20 Romanesque...

Ngày tải lên: 04/07/2014, 01:20

... Devices and Mechanisms 1 Ian McNeil The place of technology in history 1 Science and technology 2 The archaeological ages 4 The seven technological ages of man 5 The first age: man, the hunter, ... fire 5 The second age: the farmer, the smith and the wheel 11 The third age: the first machine age 22 The fourth age: intimations of automation 27 The fifth ag...

Ngày tải lên: 04/07/2014, 01:20

... building 85 5 Trabeated construction 85 7 Masonry 85 9 Advanced timber construction 86 1 Brick and tile 86 6 The arch 87 2 The vault 87 4 The dome 87 9 Cantilever construction 88 2 Roofing 88 3 Plaster 88 5 Concrete ... MECHANISMS IAN McNEIL THE PLACE OF TECHNOLOGY IN HISTORY It is strange that, in the study and teaching of history, so little attention is paid to...

Ngày tải lên: 04/07/2014, 01:20

... practice, and this is the first step in the process of moving forward to a new solution. Thus the history of technology and the history of invention are very much the same. Why study the history of technology? ... who studied, rather than the rise and fall of civilizations, the rise and fall of technologies the technologies of hunting and weapon-making,...

Ngày tải lên: 04/07/2014, 01:20

... date. These again were Egyptian and represent the first known application of a natural source of power other than animal power, the wind. The use of wind power to drive the rotating sails of a ... numbers of slaves, there was a demand for such mechanization as was available and the successors of the Romans continued to build water mills. At the time of the Domesd...

Ngày tải lên: 04/07/2014, 01:20

... for measuring the bores of cannon and the diameter of cannon balls. The crank An important development in the Middle Ages was that of mechanisms for the interconversion of rotary and reciprocating ... weight. All the gears were of brass. Galileo’s observations of the swinging altar lamp in the cathedral of Pisa marked the start of the use of the pendu...

Ngày tải lên: 04/07/2014, 01:20

... 265, 182 in 1914 and to 650,1 48 by 1920. In 19 38, 444 ,87 7 vehicles were produced in Britain and 2, 489 , 085 in the United States. There are some 22 million cars in Britain today. The rest of the ... was well and truly launched on the oceans. THE SIXTH AGE: THE FREEDOM OF INTERNAL COMBUSTION In 188 4, the same year as Parsons’s first patent, Gottlieb Daimler built and r...

Ngày tải lên: 04/07/2014, 01:20

... after the arrival of the Spanish invaders by the North American Indian: Giovanni Verazzano, who visited the Atlantic Coast in 1524, commented upon the vast quantities of copper owned by the Indians, ... ridiculous and to many others a threat to the dignity of themselves as members of the human race or worse, a threat to the very existence of humanity as the only...

Ngày tải lên: 04/07/2014, 01:20

... Tepe Giyan, in the Persian highlands, during the 4th millennium, and subsequently moved southwards to Sumeria and the Persian Gulf, and westwards to the Mediterranean seaboard, during the third ... the fourth millennium BC and were found in the 1930s at the site of Tepe Giyan, near Nahavand in Western Iran. This mountainous region, situated midway between the Persian Gulf...

Ngày tải lên: 04/07/2014, 01:20

... found its way into many of the later Roman bronzes, which by the middle of the second century AD tended to contain comparable quantities of zinc and tin. The characteristics of these alloys, which ... truly Roman in origin, the improved standards of living associated with the rapid dissemination of the Roman way of life stimulated metallurgical demand, and encourag...

Ngày tải lên: 04/07/2014, 01:20