Seguin locomotives in Germany had so much trouble maintaining steam in the 1830s a team of these animals accompanied them

In 1868 George Westinghouse introduced air these for trains making greater speed less risky

In 1897 Baldwin Locomotives introduced an engine to Japan named this for the emperor not an operetta

At first this measure of the space between the 2 rails varied quite a bit & trains had trouble switching tracks

In 1851 a contest was held to design a train to traverse the Semmering Pass in these European mountains