(1) By suspending pieces of tape from a straw, you can build an electroscope , a device that detects electrical charge.(2) After boiling it again, he measured the decay of the resulting radon gas with a gold leaf electroscope .(3) Consider a case in which the presence of an electrically charged body is determined by operations with an electroscope .(4) It is disclosed that aryl azo pyrazolones may be used as colorants in electroscopic toners.(5) Leaf electroscopes are very sensitive instruments useful in qualitative and quantitative investigations of static electrification.(6) The electroscopic anomaly is characterized by the fact that charged electroscopes discharge more slowly inside than outside of the machine.(7) This was used on his electroscopes and on his ionisation chambers for the work that he did with alpha particles.
