Measuring Tape:
It has a smooth surface that is clearly marked with increments
of inches and centimeters on both sides. It is usually about ½ inch to ¼ inch
wide and 60 inches long, and has 1/8 divisions (Fig. 2g). At one end of the
tape is attached a brass strip about 3 inches long and at the other end, a small brass covering.
Rulers:
They are used in sample rooms which are either clear plastic or
metal. It is useful to have