Many railroads are buying more and more Diesels as their steam
locomotives wear out. The Santa Fe Railroad’s Diesel at the top of the
page is called a 6000 because it has six thousand horsepower.
The New York, New Haven & Hartford uses electric locomotives because it
can get power for them easily. The one above is called the EP-4 because
it is the fourth model of electric passenger engine the road has used.
[Illustration: PERE MARQUETTE BERKSHIRE