长期保藏有价值的图书文献,历来是一个棘手的问题,近几年国外在拯救图书、延长保藏期方面有了一些较好的方法。虫、蛾、蟑螂、书虱、蠹鱼、白蚁和书蠹对图书危害极大,过去图书馆最常使用的是诸如氰化物之类的化学物质进行灭虫。由于使用这种有毒物质对人体有害,且成本高、周期较长,对图书还有一定的损害。前二年,耶鲁大学图书馆从一批该校一位学生从意大利南部寺院带来捐献的已在地下室珍藏了数百年已长虫的古代手稿,成功地找到简单、有效、易行的冷冻杀虫法。这 Long-term preservation of valuable books and documents has always been a thorny issue. In recent years, there are some good ways for foreign countries to save their books and extend their collection period. Insects, moths, cockroaches, ticks, cichlids, termites and book beetles are particularly damaging to the books. In the past, most of the libraries used chemicals like cyanide to kill pests. As the use of such toxic substances harmful to the human body, and the high cost, long cycle, the book is still some damage. The first two years, Yale University Library, from a group of one of its students donated from a monastery in southern Italy, has collected hundreds of years of ancient manuscripts in the basement and succeeded in finding simple, effective and easy-to-kill Worm law. This