Willis Carrier, Inventor of Air Conditioning
Today we take air conditioning for granted. There can be community “brown-outs,” household power outages, or families who prefer open windows. But for the most part, Americans are able to …
Entrepreneurs & Inventors
Drive-In Movie Theaters
The concept for the first drive-in movie business originated with one man in the late 1920s. Richard M. Hollingshead, Jr. came up with the concept of watching movies from one’s …
Dead Letter Office Mysteries
Today we send an e-mail, and if the address is invalid, the message bounces back. It’s annoying, but at least we know the information was not received. The Post Office …
The Wheelchair: A Great Invention Needed By Many
Wheelchairs have been greatly improved over the years. One hundred years ago, they were heavy and required someone to push the wheelchair. Today’s chairs come in many models—sleek and slim …
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How the Weather Bureau Came About
Weather. People throughout time have always cared about the weather. It affects crops, businesses, travel, and personal plans. Sometimes, all that one needs is the next day’s forecast. But often, …
James Durham, First Black Physician
James Durham is considered the first African American to practice medicine in America—first in Philadelphia and then in New Orleans while it was still under Spanish rule. Durham was born …
