Boys' Second Book of Inventions by Ray Stannard Baker

Boys' Second Book of Inventions

Ray Stannard Baker

106 pages missing pub info (editions)

fiction informative medium-paced
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It is just as well, therefore, that scientists learn more about radium and how to handle and control it before too much is manufactured. But the cost and danger of radium are only two of its least extraordinary features. Seen in the daylight radiu...

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