Bifocals
Franklin invented bifocals in 1784. Bifocals are glasses with an upper and lower half. The upper
half is for distance and the lower half is for reading. They are mainly made
for people with presbyopia. 
Electricity
Of course, Benjamin didn’t invent
electricity. He just discovered that lightning was electricity. One day in a
thunder storm, he flew a kite with metal attached to it. He could not see it in
the storm, but lightning struck the metal. He gave up but then he noticed that
the strings on the rope were standing up. And to prove that he touched the electrified
metal with another metal and it created a spark.
Lightning rod
Ben learned
how destructive lightning can be, so he he set about to protect houses from lightning
strikes. He invented the lightning rod. The lightning rod is a metal rod put at
the top of a house to protect it from burning down and to protect the people
from electrocution. Connected to the bottom of the rod is a wire that goes from
the rod down the house and harmlessly into the ground.
Franklin
Stove
In colonial
America, homes were warmed by fire places instead of heaters. Those fireplaces
went out quickly and created a lot of smoke. Then Franklin invented the
Franklin stove. The Franklin stove was a fireplace that was set in the middle
of the room instead of the wall. It was made of iron and created less smoke. Its
iron walls absorb the heat and stay warm for a long time after the fire went
out.
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Swim Fins
At the young
age of 11, Benjamin Franklin created swim fins that go on your hands. They made
him go faster, but he was not satisfied with them, because the fins caused his
hands to get exhausted.
Armonica
The armonica
is an instrument named after the word, harmony. It has 37 bowls standing
vertically. When the rims of the bowls are touched, it will make a musical
sound.
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Odometer
Although odometers
were invented in ancient times, Ben made his own version of them. He was always
curious of how far he travels on land, so he created the device to measure the
distance he traveled.
Long Arm
Benjamin
loved books, but getting books on high shelves was a challenge. In 1786, he
created the long arm. It is just a wooden pole with a mechanical grasping hand
at the end.
Benjamin Franklin was a great scientist
and inventor. He cared for the people and keeping them safe. Some our newer
inventions even come from his work.
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