51.   Backpack GPS units have revolutionized surveying of construction sites, power lines and boundaries.

52.   Before the coup, the armed Hutu bands confined themselves to knocking down power lines and massacring Tutsi civilians in northern villages.

53.   Before you go in, walk carefully around the outside of your house and check for loose power lines and gas leaks.

54.   Be careful when maneuvering the ladder into position around power lines.

55.   Benjamin promptly called for lower rates and state control of power lines and generating plants.

56.   Birdwatchers know, for instance, that power lines are one of the few places to spot the prairie warbler.

57.   A blanket of wet snow caused branches throughout the region to fall, downing power lines.

58.   A cigarette boat zoomed upstream below, while a hawk soared over the sagging power lines.

59.   A brief fire caused by overhead power lines falling onto the train was quickly put out.

60.   A cable would connect the turbines to power transmission lines on Cape Cod.