41.   Here in the upper reaches of the stratosphere there are few dust particles to reflect light.

42.   He suddenly sent a pitch rocketing toward the upper reaches of the Skydome, and the ball crashed into the netting well up the left field foul pole.

43.   High pressure means that the air in the upper reaches of the atmosphere is forced downward toward Earth.

44.   How about the gigantic scoreboard in the upper reaches of right field?

45.   Ideally, the key to breaking an act into the upper reaches of stardom is to have a multidimensional approach.

46.   If a decade ago construction cranes towered to the upper reaches of urban skylines, this time most of them are all but hidden among suburban trees.

47.   If the upper reaches of your tree turn yellow, it may already have Dutch elm disease.

48.   In flecks and black crumbs and noxious dust, it falls and flutters constantly from the false ceiling that encloses the upper reaches where the bats roost.

49.   In its upper reaches, its waters are crystal clear.

50.   In the cold upper reaches of a thunderstorm, hailstones grow as tiny water drops freeze onto them.