IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The electron multiplier is a type of ...

I HAVE recently investigated the possibility of using the Townsend electron avalanche process in a gas in a stage-by-stage system to give a highly stable electron-multiplication factor, and have ...

MY efforts aiming at improving the electroncounting devices already known and extending their range in the visible part of the spectrum when used for counting photons have led to the application of ...