Left/right axis

1796

use different liquids. He placed these liquids in bowls with pieces of metal. p.5

he noticed that a spark could make the frog's leg move. p.4

a thin sheet of metal , a coil of wire wrapped around a magnet, and a battery to create a telephone. p.32

of Quebec designed a phone receiver to have both an ear and voice piece like the phones of today. p.33

His first message only travelled 2 km. p.33

the world stared to communicate by sending
electronic signals through
the atmosphere. p.33

invented a methob of sending
pictures for newspapers over
phone lines. p.34

of ontario made the first radio that could be plugged in to a wall outlet. p.34

Columbia inwented the portable transceiver, or walkie-talkie. p.34

Anik 1 was launched

it was the world's first geostationary communications satellite. p.34

1987

Anita luszszak

she developed a pulsating generator that used less energy to generate electrical power than the conventional power generators. p.34

1998

pierre couture

he developing a car that has four electric motors on each wheel of the car.ballard power systems. p.34

1998

pierre couture

he developing a car that has four electric motors on each wheel of the car.ballard power systems. p.38

invention of the automatic oil cup and the lawn sprinkler. p.38