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WE have seen within the last years the creation of a new industry,-namely, the application of ultra-violet rays for the biologic purification of water. I think it of interest to lay before you the basis on which this industry is founded . Almost every source of light produces with the visible rays
Bull. 53o-K.)--Vanadium occurs at Placerville, Col., disseminated in a dull green sandstone along seams or in veins containing roscoelite, quartz, and pyrite. Carnotite appears as a lining on the joint surfaces. A sandstone of lighter green color owed its color to mariposite, a chromium mica. Near G
CANDLES is a project to search for neutrinoless double beta decay of 48 Ca with CaF 2 scintillators. An effective 4p active shield is achieved by placing the CaF 2 crystals in a liquid scintillator. Energy resolution is improved by converting the ultra-violet light of the CaF 2 scintillator into the