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In June, more than 50,000 patent records were added to the CAplus database. Of these, 38% were from China, 22% were from Japan, and 16% were from the U.S.

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Mercury poisoning among Hatters

The Not-So-Mad Hatter: Occupational Hazards of Mercury

The Hatter from Alice's Adventures in Wonderland is often referred to as the Mad Hatter, a characterization associated with the occupational hazards of mercury exposure present among 19th-century hatters. Known for their irritability and mental instability, hatters also experienced tremors from using mercury nitrate in a process known as carroting. It remains unclear whether the Hatter was mad or just attended a mad tea party, but the phrase "mad as a hatter" was in use 30 years prior to the publication of Carroll's novel.


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Updated: 7/30/2010 12:26:50 PM
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Updated: 7/30/2010 12:26:50 PM
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