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To avoid both difficulties , the Romans built inverted siphons , the lower parts of which were carried across the rivers on arcades 50 to 60 feet high . Moreover , the water was carried , not by one large pipe , but by a number of small ...
These carried goods of large value and small bulk , such as gold , silk , and spices , and took pilgrims to the Holy Land . The pilgrims preferred galleys to roundships because , whereas the latter sailed directly from some European ...
They stuck to the square sail , and they carried but one steering.oar or quarter rudder , on the starboard ( “ steer - board ” ) side . Norse galleys lacked the ram but possessed extremely sleek , graceful , efficient lines , like those ...
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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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