Leonardo Da Vinci and similar work show a
new enthusiasm for machines
If you want more on Leonardo, http://www.youtube.com/watch?v=hTjvsTtSYdo
is rather old-fashioned history but covers a lot of his
engineering
Exploration:
- in 1340 the Muslims cut off overland
trade to Asia and Europeans start exploring outside the
Mediterranean
- slow exploration
down the coast of Africa until Bartholomew Dias rounded
the Cape of Good Hope in 1487
- Columbus underestimated the
circumference of the earth and reached America in 1492
- in 1519 Magellan
set out on a 3 year voyage around
the world
- the full
rigged ship (about 1500) brought together many of
the inventions of the middle ages
- multiple masts and more than one sail
on each mast
- a lateen sail on the mizzen (rear) mast
gave more maneuverability
- rudder
permanently attached to a stern post instead of a
steering oar
- rounded shape
- only one of Columbus's ships was a
carrack, the new cargo ship, the others were caravels,
less study but faster
- the problem of navigation was not solved
in this period
- magnetic
compass introduced in 13th century, but knowing
which way you are going doesn't help much if you don't
know where you are
- techniques for using astrolabes and
quadrants increased the accuracy of measuring latitude
in 15th century
- navigation by going to the right
latitude and then sailing east or west until you hit
land
- more careful mapmaking was the main
improvement of the 14th and 15th centuries, particularly
knowledge of the winds
- the problem of measuring longitude was
not solved until the mid to late 1700s ( story)
- Europeans traded
for exotic products (spices, silk, etc.) with Asians but
it wasn't clear how to make money from the New World
- the native people did not have many
obvious trade products, except furs, plus the Europeans
wiped out an estimated 90% of the population of Mexico
(mostly by imported diseases, but also by war and harsh
slavery)
- Europeans chose to colonize and grow
cash crops (eg. sugar, tobacco, eventually cotton)
p. 287-8: "in the 'non-material
infrastructure' of medieval Europe was a spirit of progress
whose ingredients included intellectual curiousity, a love
of tinkering, and ambition 'to serve God' and
also 'to grow rich as all men desire to do.
- the idea of progress (instead of decline from a
golden age) came from Christianity
- use of mechanical power
- larger-scale organization of work
- Scientific Revolution