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It's going to be a hot one, and you know it's going to be worse standing in the middle of the highway directing traffic around the construction job your crew has been working on for weeks. You can keep yourself cool and avoid heat exhaustion and heatstroke by preparing for the day with our tips. And overheating is the last thing you want to do, especially if you work in the heat every day.

In the 1930s, a man was injured after tripping and falling at the Heinz Ketchup factory. His dreams of becoming a doctor ended because he hit his head hard enough so that he was in a coma. He did wake up, but his vision was permanently damaged. The man's brother was researching using fluorescent chemicals to use in his magic shows. After the injured man – Bob Switzer – recovered, he continued experimenting with fluorescent chemicals. He and his brother invented the first fluorescent paint, which they named "Day-Glo." Bob used the paint on his wife's wedding dress, thus creating the first piece of high visibility clothing.

A torque wrench ensures that you correctly tighten a bolt – not too tight and not too loose. This is important in many applications to prevent leaks. The torque wrench was invented in 1918 but did not gain popularity until 1938. At that time, Chrysler developed the beam torque wrench. Over the years, the torque wrench was improved to what it is today.