Show electric eye sees protein to the versatile electric eye has been given the new task of determining the protein protean content of wheat grain specialists of the united states department of agriculture report in making tests with the new aP apparatus the wheat is ground and the proteins extracted by chemical means by the addition of other chemicals the proteins are brought into a stable colloidal susi pension A beam of light is focused on a standard tube containing the suspension part of the light is prevented from passing through by the protein present thus the amount of light that does pass indicates the protein content A nearly automatic photometer equipped with wilh an electric eye or photoelectric cell does a the ulc measuring meas |