next regular meeting glow in the dark stones

In order to make the next regular meeting of the official report, Burke Harrell ready to do an experiment. But bad weather, rainy days in a row starting from February 26. He had to be disappointed with the phosphor and black glow in the dark powder‍ wrap was sternly put together photographic negatives desk drawer, waiting for fine weather. When the drawer shut him shoving a key pressed on black paper bag and placed the bottle on the edge of a fluorescent substance.

March 1 weather cleared, Burke Harrell ready to proceed with a new experiment. Two specially drawn carefully, he took a look at the film before the experiment to see whether the light leakage. Results of spot checks to make Burke Harrell shocked: Two negatives are exposed, on which there is a shadow of that key! How is this going? After the film is wrapped with black in a drawer, but also the continuous rainy days, there is less sunlight shine, bottle of fluorescence emitted fluorescent substance is not, why would a photosensitive film it? 

After careful analysis, Burke Harrell guess, probably double uranium oxide and potassium sulfate itself emits an invisible rays, these rays are like X-rays, as can penetrate black paper to make photographic film. At a regular meeting on March 2 Academy, glow in the dark pigments‍ Burke Harrell excited to announce this new discovery, and his original statement is unreasonable inferences. In fact, in the sunlight dioxygen potassium sulfate uranium fluorescence emitted does not contain the X-rays. Burke Harrell initial experiments done under the sun, radioactive rays actually make the film a sense of light, but he mistakenly thought it was an X-ray Bale.