This is largely because the models in use today have undergone extensive lab and field testing and their behavior in a variety of conditions is well-known, an important fact in an industry such as the railroad where the importance of safety and reliability can never be overestimated. As a ...
By the mid-1800s, railroads extended westward, too. To provide the rest of the country with beef, cowboys were charged with driving livestock from the central plains and prairies to railroad stations for transport. These cattle drives were long and legendary affairs. Perhaps a dozen cowboys on ...
to 1798, when Congress established the U.S. Marine Hospital for Navy seamen. Participation was compulsory, with deductions coming from salaries. Other examples include the mining, lumber, and railroad industries in the late 1800s, which had a vested interest in ensuring the health of its ...
the geometry of bicycles was changing to create more comfortable and faster bicycles, and gears were introduced to make riding easier and faster. Ten-speed derailleur bikes became very popular in the 1970s, although they
Since its inception in the mid-1800s, the railroad industry has used mapping as a medium to communicate important information. For many years, maps were railroads' only effective way to display entire track systems over large geographic areas in a single view. Because it was difficult to ...