Young Subject index

Contents J. M. BRAND, J. CHR. YOUNG, and R. M. SILVERSTEIN, Insect Pheromones A Critical Review of Recent Advances in Their Chemistry, Biology, and Application - M. McNEIL, A. G. DARVILL, and P. ALBERSHEIM, The Structural Polymers of the Primary Cell Walls of Dicots - U. SCHMIDT, J. HAUSLER, ELISABETH OHLER, and H. POISEL, Dehydroamino Acids, a-Hydroxy-a-amino Acids and a-Mercapto-a-amino Acids — Author Index — Subject Index. 

Venus is completely covered with dense clouds. The composition of the clouds has been the subject of much speculation for many years. It includes ice, carbon suboxide, sulfuric acid, hydrocarbons, mercuric chloride, ammonium chloride, and hydrated ferrous chloride. Recently, Young (1066a) has proposed, based on refractive index measurement, that the clouds are composed most probably of droplets of 75% H2S04. 

The incidence of contact sensitivity to 12 topically applied drugs in the relation to the frequency with which they are used in Warsaw was studied by Rudzki and Zakrzew-ski(l ). For this purpose 200,000 pharmaceutical prescriptions filled in 16 Warsaw pharmacies were analysed. The ratio of sensitive subjects to the number of prescriptions of each drug was calculated. This index of sensitization was calculated on the basis of prescribed ointments, creams and pastes etc. (Table 1). The high ratio of sensitization to Balsam of Peru is attributed to the use of suppositories. In the case of coal tar the high sensitization index may be due to non-specific irritation. In another study, Ebner (59 ) reports that Balsam of Peru was the most frequently encountered contact allergen in children and young persons. 

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