This Cumulative Index of Structure Reports is for the years 1961 to 1970 (Vols. 26 to 35). The Subject Index is arranged in strict alphabetical succession regardless of the construction of words, although in the listing of organic compounds certain prefIxes such as mono, 0-, m-, p-, D and L are disregarded. Nevertheless, some inconsistencies in the rendering of these prefIXes and others such as trans, cyclo and iso remain, and where a name is sought which contains these, it should be searched for both with and without regard for the prefIx. The Formula Index which lists Metals and Inorganic substances, is arranged in alphabetical order of chemical symbols. Organic compounds are listed in the Index of Carbon Compounds, which is indexed fIrst by C, then H with other elements following in alphabetical order of chemical symbols. A carbon compound not appearing in this Index should also be sought in the Formula Index. The scheme usually employed for the transliteration of Russian is given below. w. B. PEARSON Waterloo 20 October 1982 TRANSLITERATION OF RUSSIAN a a H p r III 1 b H j 6 C S !~ ~ B V K k T t hI Y g r n I y u .