About 200 materials commonly used in conservation (both pure reagents and commercial products) are listed. Information on each material includes synonyms, properties, flammability, recommended safe levels and effects of over-exposure. First aid procedures, treatment of fires and spills and special storage hazards are listed in each case. This information is laid out in a comprehensible form, with a page given to each material. The book is looseleaf and updates will be available periodically. Synonyms are all listed in the index.