Vapor-Compression Theory, Flour Mill, Percussion Ignition, Canning Process

John Gorrie built the first Vapor Compressor in 1842. A guy by the name of Thaddeus Lowe put a refrigerator unit on food ships in 1869. Food ships carry food from one place to another. It was important to keep food cold and fresh, so it would not rot. Ice houses stored ice during the Summertime. The first refrigerators for the home appeared in 1913.

The flour milling industry was growing rapidly in young America. A flour mill grinds wheat into flour. It had been a long time since anyone had made improvements on the flour mill. Oliver Evans was born in Delaware in 1755. Evan invented an automated flour mill called the Evans System. George Washington used the Evans System to bring flour at his mine, Mount Vernon. I have visited Mt. Vernon with my family, but we have not seen the flour mill.

John Forsyth was born in Scottland in 1769. He enjoyed duck hunting, but every time he fired the gun would let out smoke before he could shut the duck. It would also make a loud noise that would scare the ducks and so he invented a new ignition for his gun called the percussion ignition. It fired better than the old system, produced less smoke, and worked in wet weather.

Tin cans replaced glass jars by 1812. Canned food is important during times when there is fresh food. Mason jars were invented in 1858. You can food in mason jars too.