Jethro Tull
Eli Whitney
James Watt
James Hargrave
Henry Bessemer
process for making steel
Norfolk Four-Crop Rotation
vaccine for rabies cotton gin
seed drill spinning Jenny
steam engine
Jethro Tull - seed drill
Eli Whitney - cotton gin
James Watt - steam engine
James Hargrave - spinning Jenny
Henry Bessemer - process for making steel