OBSERVATION DOME SLEEPER:
The principle of an upper deck observatory level in
railroad cars first filled a practical need on frieght
train cabooses before it was adapted to passenger cars.
As early as 1906 a prototype of modern passenger dome
cars was built. But it was not until 1945 that the
first passenger car featuring an absrevation dome was
placed in service. Since then, the observation dome
has become one of the most popular features of modern
roalroad travel. It is enjoyed today on coaches, lounge
cars and diners, as well as on sleeping cars like
the one illustrated above.