Engine Half a Block Long Designed especially to burn a grade jf coal of comparatively low-heating value, a huge engine constructed for the Northern Pacific railway Is 12ri feet iong, weighs more than 1,000.0K) pounds and lias 34 wheels. Including the 12 on the tender, says Popular Mechanics Me-chanics Magazine. An interesting feature fea-ture Is the mechanical stoker which will crush, deliver, and distribute about the huge Erebos. more than 22 tons of coal an hour. It is expected that the locomotive will be able to haul, in one train, cars that are now made up into two.