Page 17 - IP3A 011 The Nile River 정원영

As they traveled from the south to the

north, the current carried them easily on

the Nile. And when they used oars, they

were able to move faster and with more

ease.

Going from the north to the south was

more difficult because they were moving

against the current and wind.

Even using oars didn’t make it any easier.

So, one smart and skillful mannoticed the

movement of the wind, and came up with

several ways to use it to their advantage.

He decided that the best way was to

attach a piece of cloth to catch the wind.

Trying various types of cloths, he cut them

up into different shapes and finally

decided to use linen to create a square sail.