There can be no intelligent control of the lead danger in industry unless it is based on the principle of keeping the air clear from dust and fumes.
Alice HamiltonAbout author
- Author's profession: Scientist
- Nationality: american
- Born: February 27, 1869
- Died: September 22, 1970
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For, after all, every one who wishes to gain true knowledge must climb the Hill Difficulty alone, and since there is no royal road to the summit, I must zigzag it in my own way. I slip back many times, I fall, I stand still, I run against the edge of hidden obstacles, I lose my temper and find it again and keep it better, I trudge on, I gain a little, I feel encouraged, I get more eager and climb higher and begin to see the widening horizon. Every struggle is a victory. One more effort and I...
Helen Keller