History 4 Lesson 20 

The Christan monks were able to help preserve and restore civilization after the Roman empire collapsed by using inventions. Three of the inventions are the water wheel, cam and the trip hammer. The monks used these inventions to crush ingredients to make beer. The water wheel was turned by water in a creek or stream, or a river which turned the shaft. The cam was attached to shaft and activated the trip hammer and it crushed the ingredients to make the beer. They started making beer because the water had germs in it and therefore they said it was not healthy to drink.

 My favorite invention is the water wheel. One of my favorite things that the water wheel does is that Egyptians used it to irrigate  fields. The water wheel had buckets on it the buckets scoped up the water and dumped into a well where the water ran to different ditches  in the field. Another use for the water wheel is it is used in gran mills and a trip hammer. And that is why my Favorite invention is the water wheel.