Who were the leaders in the railroad industry during the 1800s? (example: who got rich from the railroad industry? )

The major Industry leaders were Andrew Carnegie who was the king of steel, John D. Rockefeller who monopolized the oil industry, Cornelius Vanderbilt who was the most powerful railroad tycoon, and he built the Transcontinental Railroad and JP Morgan. All of these men were very rich.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on