Gisella's School

This week in history I decided to write about the traffic light.             Increasing traffic congestion on roads in the 18th century led to increased traffic-related deaths. JP Knight invented the traffic light in 1868 for the London Bridge Project based on his experience with train traffic. Traffic lights regulate the flow of traffic, increase…

read more

This week in history I learned about roller skates, barbed wire, and the cowboy hat.             The first thing I learned about this week was roller skates. The Civil War killed 600,000 men between 1861 and 1865. After some European attempts, James Plimton Invented the roller skates in 1863. They are simple, relatively safe, shoes-on-wheels…

read more