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Now , steel is an alloy of iron and carbon . Wrought ironsoft , malleable , and hard to melt - contains very little carbon , usually less than 0.1 per cent . On the other hand , cast iron - hard , brittle , and easy to melt - contains ...
Like the classical Greeks , they made but little use of mortar , preferring to hold the stones of their temples together with iron dowels . Large stones , like the capstone of a shikhara , were raised on high by hauling them up earthen ...
Some of the earliest guns were of wood strengthened by iron hoops , or of copper and leather . Guns soon evolved into cannon and hand guns . The latter at first were small cannon lashed to poles , which the gunners held under their arms ...
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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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