1. The chlorophyll content in kafir, based upon weekly determinations, increases generally to the stage of seed maturity in the plant. It begins to decrease as the grain hardens. The chlorophyll content varies directly with the amount of evaporation and with the temperature. 2. There is a positive correlation between the chlorophyll content and the yield of kafir. 3. Varietal differences in the chlorophyll content seem to be consistent throughout the growing season. 4. The comparison of seasonal multiple correlation coefficients and their standard errors of estimate has made it possible to reduce the latter appreciably. The elimination of indefinite factors by the scoring process, and the addition of others, have aided in securing a higher correlation coefficient. 5. For comparative purposes, the microspectroscope is very effective in determining the relative concentrations of chlorophyll in kafir seedling leaves. These leaves are of uniform thickness when grown under the same conditions. 6. Solutions may...