There are several reported routes of transmission of the rabies virus. Rabies is most often transmitted through a bite from an infected animal. Less frequently, it can be passed on when the saliva of an infected animal enters another animalâs body through mucous membranes or an open, fresh wound.
Eli Whitney invented a cotton gin. It was an improvement on the roller gins of the time in that it separated seeds from fibers faster and more easily. But his greater achievement was, arguably, the development of interchangeable parts.
It consisted of a roller that had wire hooks to pick the cotton and another roller to clean it. Cotton could now be picked at an estimated fifty times faster than before. Then in 1798, Whitney created interchangeable parts for guns. The price was low because they were easy and fast to make. The drawback was that the quality of the guns was not as efficient as those that were hand made. The choice was between quality versus quantity, and most factory workers chose quantity. Eli Whitneyâs cotton gin and interchangeable parts made him one of the great inventors during the Industrial Revolution.