Show tiny electric current almost beyond belief an electric current so small email that at the pressure and price prica of tho ordinary bouso lighting current it would coit loss less than a four hundred billionth of a cent can bo measured with tho the aid of a now instrument developed in the standardizing laboratory 0 of tho the general electric company at lynn mass it is known ammeter and as a a current of a ten millionth of an amporo is ia sufficient to carry the pointer completely across tho the dial while a single division on the scale represents ono five alvo hundredth of this amount the instrument will be useful in measuring tho the minute currents in insulators and radio tubes but it is stated that the chief application foreseen ht at present will bo be in combination with a photo elec coll cell for accurate measurements of illumination at present tho the intensity of electric lights for example is ia measured by visually comparing then them with another light of standard brightness the electrical eye the photoelectric photo electric coll cell may now replace 1 tho hu human oye eye in 11 this work orl for tho the cell converts light energy into tiny electric currents which may bo be easily measured with tho the now instrument |