macological drugs, acting on digestion and metabolism. The keyword pharmaceutical technology (26 pages) completes the pharmaceutical part. Important organic compounds like petroleum sulphonates, phenol and its derivates and resins, phenothiazines, phenyleneand tolylendiamines phosgene, phthalocyanines, phthatic acid and derivates take place with 8 keywords and t68 pages. In addition, the keywords for the metals Platium and Plutonium and chapter about toxikology crop protection products demonstrate that every volume at the “Ullman” is a walk through the whole chemistry. Finally the keyword photography with 102 pages can be seen as a scientific compendium to OLU daily “picture-production”. The comparison with the old edition proves the subtitle “revised and expanded”. It stands to reason that there are English lists of content for every keyword, English index of keyword, symbols. units and abbreviations. Tbe new volume is once more an example for Ullmann’s reputation as a scientific encyklopedia for almost every subject. B. SCHirTZE
IJBmamw Encyklofidk der tecbnlachen Chende. VoI. 18: Petrosulfonate bis Plutonium (Petroleum Suipbonates of Plutonium). Verlag Cbemie GmbH. Weinbeim, New York 1979,738 pp., 216 figures and 147 Tables. Subscription price DM 425, Final price DM 475. The volume Mdeals with the keywords “Petroleum Sulphonates to Plutonium” and contains 34 keywords. A broad review (152 pages) about pigments give the most extensive part with the 7 keywords inorganic pigments (properties and methods of examination); white, black and coloured pigments; pigments with special properties; fillers and organic pigments. Phosphor and its compounds (oxides, acides, phosphates, mscellaneus) is the next extensive part of the new volume (116pages). Pharmaceuticals are described with 110 pages. These chapters are subdivided into nine keywords: general, analeptics, antipileptics, contraceptives, muscle relaxants, ophthalmological products. parasympathominetics, psychophar-