They needed a better way to help farmers keep their fields cleared.
Why was the plow invented?
200
1849
When was the safety pin invented?
200
It is a smaller lock and flat key with serrated edges.
What is a cylinder pin?
300
Cyrus H. Mccormick
Who invented the reaper?
300
The first message was sent from Washington D.C.
Where was the first telegraph message sent from?
300
Made it easier to mow over thick soil that normally clogged up machines that previously did the work of plows.
What did the plow do?
300
Walter Hunt
Who invented the safety pin?
300
Linus Yale Jr.
Who invented the cylinder pin?
400
Allowed farmers to more than double their crop size, and spurred innovations in farm machinery.
What is a reaper?
400
It is a set of dots and dashes to each letter of the English alphabet, and allowed for the simple transmission of complex messages across telegraph lines.
What is morse code?
400
Steel
What metal was made to make the plow?
400
To pay off a $15 debt
Why did Walter Hunt invent safety pin?
400
His father invented and earlier pin-tumbler lock in 1848.
What did Linus Yale Jr. father do?
500
Illinois
What state was the reaper invented in?
500
He also invented Morse Code.
What else did Samuel Morse invent?
500
1837
When was the plow invented?
500
The metal in which the safety pin was made was a combination of copper, iron, aluminum, gold, silver, and platinum.
What metals were used to make the safety pin?
500
Yes, it is still used today in car doors and outside doors of buildings