Show to the pupils the best solar spectrum that can be produced under the controlling conditions.
Call attention to the six colors, red, orange, yellow, green, blue and violet, and the order of their arrangement in the spectrum.
Present the colors separately as far as possible, selecting the best conditions available for each one.
Pigmentary Spectrum Colors.
MATERIAL.
Neutral gray or white card to cover desk top for a background.
Chart of Pure Spectrum Scales.
Colored Paper Tablets, Selection No. 1, embracing the six standards and the intermediate spectrum hues, eighteen pieces.
Color Wheel or Tops.