there was a drastic change from 18Th to 20 Th century..
Steam engine
More days in a century than what? You need to compare "days in a century" with something else if you use the comparative word "more."
The Boll Weevil.
crop rotation
Henrik Ibsen
The ancient Greeks like Plato and Aristotle developed philosophical analysis. A+ 1900s
Crop rotation
Crop rotation
Joseph Texte has written: 'Jean-Jacques Rousseau and the cosmopolitan spirit in literature; a study of the literary relations between France and England during the eighteenth century' -- subject(s): Comparative Literature, English and French, French and English, Literature, Comparative 'Etudes de litte rature europe enne'
Prior to the 1990s, it was rubber, minerals, and agricultural products. 21st century, is some agricultural products, and lots of clothing, toys, and collectible items (reproduction militaria souvenirs).
The comparative form of much is more. The superlative is most.
L. W. Thwaites has written: 'The marketing of agricultural produce in eighteenth century Oxfordshire'