An Encyclopedia of the History of Technology part 4 pps

... 583 tramways 161, 45 6, 555–8 transfer machines 41 7 transfer printing (pottery) 1 94 transformers 371 transistor radios 728 transistors 42 , 41 9, 703 transmission cables 371–2 transplanting 773 transporter ... disc 328 Van Harinxma Canal 49 2 Van Starkenborgh Canal 49 2 Vanguard rocket 656 Variomatic belt dirve 45 2 vat dyes 199 vaulting 8 74 9 Velcro fastener 852–3 velocipede 44 5...

Ngày tải lên: 04/07/2014, 01:20

... transport ancillaries 45 9 Road maps 46 1 Bridges 46 2 Tunnels 46 7 Earthmoving and roadbuilding machinery 47 0 9. Inland Waterways 47 4 John Boyes The ancient world 47 4 The British Isles 47 5 France 48 2 The ... road transport: initial experiments 43 9 Bicycles 44 2 Motor cycles 44 7 The motor car 44 9 Automotive engines 45 3 Trams and trolleybuses 45 6 Buses 45 7 El...

Ngày tải lên: 04/07/2014, 01:20

... DEVICES AND 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 the history of technology. Political and ... was more often than not economic, and economic history and the history of technology can surely be considered as twin hand-maidens, the one almost totally depen...

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

... one of the causes of the decline of the Roman Empire. The Dark Ages The last Roman troops left Britain in AD 43 6 and all contact between Britain and Rome had ended by 45 0. To a great extent the ... 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...

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

... 19 14 and to 650, 148 by 1920. In 1938, 44 4,877 vehicles were produced in Britain and 2 ,48 9,085 in the United States. There are some 22 million cars in Britain today. The rest of the story of the ... in the materials used in buildings. They caused the decline of many towns and villages which were not served by the railway lines. They speeded up the mails and greatly...

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 15 24, 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