Page:Popular Science Monthly Volume 73.djvu/62

From Wikisource
Jump to: navigation, search
This page has been proofread, but needs to be validated.
58
THE POPULAR SCIENCE MONTHLY

Transformation Products of Thorium, Actinium and Radium according to Rutherford

PSM V73 D062 Half life and radiation chart by rutherford.png

 

while the emanation underwent a change into argon. The lithium, we are assured, could not be found in the original materials; it represents about .01 per cent, of the sodium and calcium found in the same experiment; its actual amount, after correcting a slight oversight in Ramsay's estimate, would be 0.00000003 gram. For such a quantity the amount of copper transformed would be too minute for the detection of a loss from the 0.3 gram of copper which the original solution may be assumed