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In the late Republic and early Principate , walls became essentially masses of concrete , in whose surfaces stones or bricks had been inserted . These bits of stone or brick added nothing to the strength of the wall , as the concrete ...
It is the Great Wall of China , a greater wonder than any of the Seven Wonders of the Greek writers . When he came to supreme power , Tsin disbanded the many little feudal armies of China . To cope with raids by the Mongolian nomads ...
Like a colossal caterpillar , the wall stretched over mountain and vale for a crow's - flight distance of 1,400 miles , so that if its eastern end were in Philadelphia the western would be in Kansas . Counting all the bends , branches ...
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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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