The book contains 25 pages. Each page is about one millimeter thick. The pages contain very small particles (微粒) of silver. The pages can be used as filters (过滤器) to remove harmful microorganisms (微生物) that can pollute drinking water. The filter kills the organisms that pass through it.

　　Pictures on the pages show the dangers of dirty water and how to use the book for those unable to read. The pages are made of filter paper. They are designed to be torn from the book. Water can be poured through the paper to be cleaned.

　　Ms Dankovich, the inventor, says each page can treat up to 100 liters of water. She recently presented her invention at the meeting of the American Chemical Society in Boston, Massachusetts. She was asked whether she had considered adding classic literature on the book's pages.

　　“The idea of classic texts—that's of interest maybe later. We have discussed a little bit more exciting text. But we really haven't had the time to go through that_part，” she says.

　　Teri Dankovich and another researcher tested the drinkable book in Bangladesh, Ghana and South Africa. The tests proved to be successful.

　　Water for Life, a non－governmental organization, has provided financial support for the project.

　　面临着饮用水被污染的现象，科学家发明了一种特殊的纸张，可把脏水过滤成能饮用的水来提高人民的生活质量。

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