Sugar Beets at the Factory
Within very recent years the beet has supplanted the sugar cane as the chief source of the world's sugar supply. This would have seemed quite incredible to the chemists of a century ago, who declared it impossible to produce sugar from the beets in paying quantities. But the plant breeders of Europe solved the problem of increasing the sugar content of the beet, until now it is one of the most profitable of crops.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 8 Chapter 5