LOC's Public Domain Archive
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![Color expert for Uncle Sam. Washington, D.C., June 20. When it was discovered that color plays an important [role] in marketing of cotton, Miss Dorothy Nickerson, Color Technologist of the U.S. Department of Agriculture, developed a method for measuring the color of raw cotton mechanically. The equipment comprises a comparator, a motor on which to spin standard color discs, the color discs, and standard artificial daylight. When looking through the comparator, the operator sees a circular field, the upper half made up of the color of the cotton and the lower half made up of the disc colors, 6/20/38](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTUvMTEvMjUvY29sb3ItZXhwZXJ0LWZvci11bmNsZS1zYW0td2FzaGluZ3Rvbi1kYy1qdW5lLTIwLXdoZW4taXQtd2FzLWRpc2NvdmVyZWQtdGhhdC02NDAuanBn/40/32/webp "Color expert for Uncle Sam. Washington, D.C., June 20. When it was discovered that color plays an important [role] in marketing of cotton, Miss Dorothy Nickerson, Color Technologist of the U.S. Department of Agriculture, developed a method for measuring the color of raw cotton mechanically. The equipment comprises a comparator, a motor on which to spin standard color discs, the color discs, and standard artificial daylight. When looking through the comparator, the operator sees a circular field, the upper half made up of the color of the cotton and the lower half made up of the disc colors, 6/20/38")
