The challenge facing the signal industry was achieving the same level of safety and reliability that was inherent to purely mechanical systems. An experimental hydro-pneumatic interlocking was installed at the Bound Brook, New Jersey junction of the Philadelphia and Reading Railroad and the Lehigh Valley Railroad in 1884.
This is an example of an expository paragraph   In 1997, 175,000 volunteers picked up three million pounds of garbage along the coasts of the United States. As a result, bo â¦ th people and sea animals can enjoy cleaner and safer environments.
When we read fiction novels, we are taking in narrative text. This type of text tells a story and generally uses a lot of emotion. The opposite of this is expository text, which exists to provide facts in a way that is educational and purposeful. The text is fact-based with the purpose of exposing the truth through a reliable source.