An Encyclopedia of the History of Technology part 41 pptx
The grammar of the english verb phrase part 41 pptx
... 276 5. The absolute use of the present perfect on the irritation of being kept waiting, of standing around doing nothing (or rather on the minimal amount of such irritation), whilst the alternative ... There may still be other types of present perfect sentences (containing an adverb enforcing an indefinite reading) in which there can be progressive meaning without expl...
Ngày tải lên: 01/07/2014, 23:20
An Encyclopedia of the History of Technology part 108 pptx
... 282 poppet 282 slide 282, 344–5, 404 thermionic 41, 727, see also diode; triode Wankel rotating disc 328 Van Harinxma Canal 492 Van Starkenborgh Canal 492 Vanguard rocket 656 Variomatic belt dirve ... machines 417 transfer printing (pottery) 194 transformers 371 transistor radios 728 transistors 42, 419 , 703 transmission cables 371–2 transplanting 773 transporter bridges 496, 518 trapetu...
Ngày tải lên: 04/07/2014, 01:20
An Encyclopedia of the History of Technology part 1 potx
... technology 2 The archaeological ages 4 The seven technological ages of man 5 The first age: man, the hunter, masters fire 5 The second age: the farmer, the smith and the wheel 11 The third age: the first ... 537 Hovercraft and hydrofoils 538 Lifeboats and lifesaving 539 CONTENTS Preface xiv Introduction: Basic Tools, Devices and Mechanisms 1 Ian McNeil The place o...
Ngày tải lên: 04/07/2014, 01:20
An Encyclopedia of the History of Technology part 2 doc
... how they fought their wars and which side won, was largely dependent on the state of their technology and that of their enemy. Their motivation was more often than not economic, and economic history ... history and the history of technology can surely be considered as twin hand-maidens, the one almost totally dependent on the other. So far as social history is concer...
Ngày tải lên: 04/07/2014, 01:20
An Encyclopedia of the History of Technology part 3 docx
... 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
An Encyclopedia of the History of Technology part 4 pps
... 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 Domesday survey there was an estimated ... of his mount to the weapon in his hand, be it sword, axe or lance. Some idea of the state of manufactures in the sixth and seventh centuries is given by artefacts...
Ngày tải lên: 04/07/2014, 01:20
An Encyclopedia of the History of Technology part 5 docx
... 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
An Encyclopedia of the History of Technology part 6 docx
... 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 accelerated the spread of ... spread of news by the rapid distribution of the daily papers. They popularized seaside and other holiday resorts and improved communications by their use of the telegraph...
Ngày tải lên: 04/07/2014, 01:20
An Encyclopedia of the History of Technology part 7 pdf
... 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
An Encyclopedia of the History of Technology part 8 ppt
... 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