PHOTOELECTRIC APPARATUS FOR MEASURING LEAF AREAS

Abstract
The apparatus consists of a powerful diffused light source and a photoelectric cell connected to a suitable electrical measuring device. The leaves to be measured are interposed between the light source and the photoelectric cell and cut off a portion of the light in direct relation to their area. By a suitable calibration, the readings recorded on the electrical measuring device connected to the photoelectric cell may be converted into area measurements.

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