THE specific γ-activity of ordinary potassium, in the form of ‘AnalaR’ potassium chloride, has been determined by the following procedure: (1) A source of potassium-42 (obtained by the irradiation of ...

When we talk about crystals around here, we’re generally talking about the quartz variety used to make oscillators more stable, or perhaps ruby crystals used to make a laser. We hardly ever talk about ...

This specimen is one of 115 samples of "fine and rare chemicals" produced by John Uri Lloyd for display at the Cincinnati Industrial Exposition of 1875. Lloyd was presumably awarded a "blue ribbon" ...