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One was the lever mill , in which the upper stone was fastened to a beam , pivoted at one end and free to move at the other . The operator , pushing and pulling on the free end of the beam , worked the upper stone back and forth over an ...
The next stride towards the age of power machinery was to combine the rotary mill with the water wheel , making a water mill . The earliest allusions to the water mill go back to early – I. Strabon mentions that : “ It was at Kabeira ...
sails at right angles to those of the main mill . By means of gearing , the fantail kept the mill facing the wind . This was one of the first self - regulating machines . Renaissance engineers also designed a number of windmills with ...
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LibraryThing ReviewCrítica de los usuarios - PDCRead - LibraryThing
This was originally written in 1962, and is therefore is a little dated. Sprague de Camp has written a book all about the different civilisations and the technologies that that invented or acquired ... Leer comentario completo
LibraryThing ReviewCrítica de los usuarios - Schmerguls - LibraryThing
5609. The Ancient Engineers, by L. Sprague De Camp (read 21 Jan 2019) This book was first published in 1963 and hence its bibliography includes nothing after that date. It undertakes to tell of the ... Leer comentario completo
One The Coming of the Engineers
Three The Mesopotamian Engineers
Four The Greek Engineers
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