Minors, midwives, and low mechanicks

The first part of this article mostly talks about how to a navigate through the sea. The winds helped make up the different trade routes. The current of the Atlantic winds is called a gyre which was then first used by a man by the man of Vasco da Gama. It was said he set a ship on fire one time with a bunch of people on it that we're going to Mecca. The second part of this article was about the longitude problem, which was that by looking at the stars sailors could tell where on the north south meridian they were, but not how east or west they were. It then shown that there was a way to measure the longitude, but it was not accurate because of the variability in temperature and humidity.