61.   An electrical pulse in a wire travels close to the speed of light.

62.   I was amazed at his speed of working.

63.   ...the sheer speed of the unification process.

64.   He estimated the speed of the winds from the degree of damage.

65.   ...the square of the speed of light, an exceedingly large number.

66.   The average speed of the winds remained constant.

67.   ...moving at thrice the speed of sound.

68.   The speed of economic change has been so great that the tax-collecting system has been unable to cope.

69.   The speed of his reactions saved his life.

70.   We felt little sense of speed or motion.