"Larry Jaques" wrote in message
...
On Thu, 12 Feb 2015 20:43:17 -0500, "Jim Wilkins"
wrote:

"Larry Jaques" wrote in message
. ..
On Thu, 12 Feb 2015 08:43:21 -0500, "Jim Wilkins"
wrote:


They don't appear to have known about this carving of a
construction
crane.
http://mv.vatican.va/3_EN/pages/x-Sc...Sala01_06.html
They showed a modern pulley block without giving that image as
proof
that the Romans used them.

Wow, cranes, pile-drivers, and pulleys? They were further evolved
than I'd thought. Very cool.

In many ways we didn't advance past them until 1700 - 1800.

Their concrete formula still works to this day.

A Roman Army Knife:
http://www.fitzmuseum.cam.ac.uk/opac...priref=70534#6

-jsw