No photograph is shown for this exhibition. The museum displays an image only where it can show the object honestly.
About this date
Eli Whitney built the gin in 1793 and was granted a patent in 1794. Roller gins existed earlier in India and elsewhere.
About credit
Similar roller gins had been used for long-staple cotton. Whitney’s toothed machine handled short-staple cotton, which grew across the American South.
Chapter II
The world before
Life before the Cotton Gin
Removing seeds from short-staple cotton by hand was so slow that it limited production.
II
The human achievement
How it came about
Whitney’s gin used a rotating drum with wire teeth to draw fibre through slots too narrow for seeds. One machine could clean many times as much cotton as a worker by hand.
III
Understanding the invention
How it works
The Cotton Gin, explained in two steps.
01
Step 01 of 02
Teeth and slots
Teeth snag fibres and pull them through a grid; seeds are left behind.
Teeth and slots
A brush clears the teeth
IV
The transformation
What changed for humanity
Economy
Cotton became the leading American export.
Society
The demand for labour deepened the system of slavery; enslaved people in the US rose from roughly 700,000 in 1790 to about four million by 1860.
It made short-staple cotton profitable and fuelled the expansion of slavery in the American South, an outcome that shaped American history.
V
Before and after
Life before and after The Cotton Gin
Before
A pound a day by hand.
After
Dozens of pounds a day by machine.
On larger screens, drag the divider (or use the arrow keys) to give more room to the world before or after.
VI
Its legacy
What came after
MHI 055
The Cotton Gin
Beyond the collection
Textile mills
Cheap cotton fed mills in Britain and New England.
Beyond the collection
A hard lesson
It shows how a labour-saving device can increase a harsh form of labour elsewhere.
VII
Human stories
The people and the moments
A patent that did not pay
Whitney struggled to enforce his patent against copies and made little money from it. He later turned to manufacturing firearms.
Where accounts differ, this museum follows the documented record and says so.