Presentacin de PowerPoint

Benjamin Franklin's Inventions, Discoveries, and Improvements

By :KEVIN QUINTANA

BIFOCALS (1775)

A modern replica pair of the type of split bifocal spectacles known to have been worn by Benjamin Franklin in the mid 1780sBifocals are eyeglasses with an upper and lower half, the upper for distance, and the lower for reading.

Gradual deterioration to focus on close objects or to se small letters.PRESBYOPIA

common element" which he named electric fireElectricity (1752)

Further, electricity was "fluid" like a liquid. It passed from one body to another.

Lightning Rod (1752)

It is a rod attached to the top of a building, connected to the ground through a wire.

Franklin Stove (1742)It is a metal-lined fireplace (chimney) that stands in the middle of a roomIt provides more heat and less smoke than an open fireplace and uses less wood.

Glass Armonica(1761)

He created a mechanized version.

THANK YOU

null207424.67