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Year by year the map of the New World was charted in gold, silver and blood. Quickly the Spaniards superimposed their own civilization and by 1539 there was a printing press and by 1551 a university in Mexico City. By mid-century some 20,000 Negroes had been brought to Cuernavaca and Vera Cruz. There were productive silver mines in Mexico by the 1540s. Thomas (Ref. 213) says that while the Spaniards conquered Central and South America on horses, mules sustained the conquest. Convoys carrying gold and silver and linking Lima, Cuzco, Panama, Vera Cruz and Mexico were established with these valuable animals. The great harbor at Porto Bello, Panama, became the most thriving town in the Americas as the Atlantic terminal of the mule track across the isthmus carrying the Spaniards' treasure from South America. (Ref. 95 , 8 , 213 , 150 ) Additional Notes

Some of the relative values of things in Central America may be seen in Braudel's (Ref. 292 ) comments about Panama in 1519. A horse was worth 24 1/2 pesos, an Indian slave 30 pesos and a skin of wine 100 pesos. Pedro de Alvarado, who had become governor of Guatemala, heard of rich lands in Peru and led an expedition of 500 men to Quito in 1534, by boat. It is probably an indication of the long time, extensive maritime experience of the people of that area that Alvarado's Indian navigator carried him directly from the Port of Iztopa (near present San Jose, Guatemala) to the Bay of Manta in Ecuador. That was a trip across open ocean of about 1,300 miles, minimum. Land travel, however, would have been at least 1,900 miles, not considering the ups and downs in the mountains, lake detours and the like through mountainous jungles that were actually probably almost impassable. (Ref. 36 )

The situation in the Caribbean Basin in this century deserves further discussion. By 1501 Spanish settlers in Hispaniola (Santa Domingo) had already introduced black slaves, the first in the New World. While Columbus was kept in the Spanish court, still under the cloud from his 3rd voyage, Amerigo Vespucci returned from the west Atlantic, proclaiming that there was an entire continent there, a fact which resulted eventually in its being named after him. Columbus was finally allowed a 4th trip, although refused permission to visit his old Santo Domingo domain. He had 150 men in 4 ships and they made the Atlantic crossing on the trade winds, landing on an island just south of Dominica in 21 days

Trager (Ref. 222 ) has given a gross misstatement on page 161 to the effect that Columbus' 4th voyage took 8 months for the Atlantic crossing
. About 2 weeks later he sent a warning to a large Spanish fleet carrying gold that they should not leave the port of Santo Domingo because of an approaching hurricane. The fleet commander laughed at the warning and started for Spain, only to have his flagship go down and his fleet scattered by the storm. 200,000 castellanos of gold went to the bottom of the Gulf. Columbus' squadron, anchored in a protected area, escaped damage the first night, but did receive some battering the next day.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, A comprehensive outline of world history (organized by region). OpenStax CNX. Nov 23, 2009 Download for free at http://cnx.org/content/col10597/1.2
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