[Measuring place for the detection of ultra-weak photon radiation].

: A measuring method for the detection of ultra-weak photon-radiation from living matter is described. Also the fluorescence-radiation is provable. The latter is of necessity for special-fluorescence investigations. A proof-sensibility of phi = 1.483 10(-16)W (respectively 7.63 10(-17)W for the distance of 65.5 mm-filter - slide replaced by trial-slide) is calculable for lambda = 554 nm with the device constant found out.