In

the

past,

people

measured

wind

speed

with

the

Beaufort

Wind

Scale.

To

use

this

scale,

people

looked

at

how

the

wind

was

affecting

trees

or

other

objects

outside.

Then

they

compared

what

they

saw

to

the

descriptions

on

the

wind

scale.

Sir

Francis

Beaufort,

a

British

Admiral,

invented

this

scale

in

1805

for

sailors.

It

was

later

adapted

for

land

use.