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Once men had the fine Median riding horse , chariots became less effective than the same number of men mounted on horses . After the time of Alexander the Great , chariots went out of use for fighting , albeit they were kept for private ...
With such a sail one can sometimes sail into the wind , but less than a point ( 1144 ° less than a right angle ) and then only if the ship is handy , with a deep keel ( to keep it from sliding sideways ) , and not too much upperworks .
This arch is an arc of a circle less than a full semicircle . Although its outward thrust is greater than that of the semicircular arch , this did not much matter when the bridge was braced at each end against solid river banks .
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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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