Block Comparator - Wood/Glass/Rubber/Metal

This artifact is a LaMotte Block Comparator, used in the citrus industry.  It contains one set of Permanent Color Standards, such as Bromthymol Blue (pH 6.0 - 7.6).  This portable kit could be used in the field.  CONDITION:  The wood top to this artifact is missing.   The unit measures 8 7/8" wide, 5 1/8" high and 2" in thickness.
Abstract/Description: This artifact is a LaMotte Block Comparator, used in the citrus industry. It contains one set of Permanent Color Standards, such as Bromthymol Blue (pH 6.0 - 7.6). This portable kit could be used in the field. CONDITION: The wood top to this artifact is missing. The unit measures 8 7/8" wide, 5 1/8" high and 2" in thickness.