56 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS The Editor, Nature, for Fig. 3. The Editor, British Journal for the Philosophy of Science, for Fig. 5. The Editor, Science, and Prof. S. S. Stevens for Fig. 6. REFERENCES (1) Scott Blair, G. W. J. Soc. Cosmetic Chemists 11 181 (1960). (2) Scott Blair, G. W. in Harrison, V. G. W. Some Recent Developments in Rheology (1950) (United Trade Press, London). (3) Stevens, S.S. Science 105 677 (1946). (4) Stevens, S. S. Chap. in Churchman, C. W. and P. Ratoosh 3/Jeasurement: Definitions and Theories (1961) (Chapman & Hall, London). (5) Sheppard, D. Brit. J. Psychol. 45 40 (1954). (6) Boring, E. C. A History of Experimental Psychology, 2rid Edn. (1929) (Appleton-Century- Crofts, Inc. New York). (7) Bergson, H. Essai sur les donndes immddiates de la conscience {transl. F. L. Pogson as Time and Free Will (1960) (Swan Sonnenschein, London). (8) Stevens, S.S. Psychol. Rev. {14 157 (1957). (9) Treisman, M. Brit. J. Philos. Sci. 15 130 (1962). (10) Treisman, M. Nature 198 914 (1963). (11) Treisman, M. Quart. J. Exper. Psychol. 1õ 11, 387 (1964). (12) Tannery, J. Correspondence in Revue Scientifique reproduced in Etudes Psycho- physiques by J. Delboeuf, Baillitre et Cie, Paris (1883). (13) Stevens, S.S. Quart. J. Exper. Psychol. 1õ 383 (1964). (14) Katz, D. Cereal Chem. 14 382 (1937). (15) Scott Blair, G. W. and Coppen, F. M. V. Proc. Roy. Soc. (B) lg8 109 (1939). (16) Scott Blair, G. W. and Coppen, F. M. V. Amer. J. Psychol. 55 215 (1942). (17) Harper, R. Amer. J. Psychol. õ0 554 (1947). (18) Scott Blair, G. W. and Coppen, F. M. V. Nature 149 22 (1942). (19) Nutting, P. G. Proc. Amer. Soc. Test. 3/Jater. gl 1162 (1921). (20) Scott Blair, G. W., Veinoglou, B.C. and Caffyn, J. E. Proc. Roy. Soc. (A) 189 69 (1947). (21) Scott Blair, G. W. and Caffyn, J. E. Phil. g/Jag. (ser. vii) 40 80 (1949). (22) Scott Blair, G. W. Brit. J. Philos. Sci. 11 272 (1961). (23) Dingle, H. Phil. g/Jag. 40 94 (1949). (24) Harper, R. and Stevens, S. Quart. J. Exper. Psychol. 16 204 (1964). (25) Stevens, S.S. and Guirao, M. Science 144 1157 (1964). (26) Oldfield, R. C. and Zangwill, O. L. Brit. J. _Psychol. $g 267 $$ 58 113 (1942).

Book reviews HISTONES AND OTHER NUCLEAR PROTEINS. I-I. Bush. Pp. xiii -b :2•3•3 -b Ill. (19•35). Academic Press, New York and London. 7•3s. Recent advances in molecular biology have shown how deoxyribonucleic acid (DNA) is the initiator of the chain of reactions which, through the biosynthesis of messenger ribonucleic acid (RNA), leads to synthesis of the cellular proteins. Not all proteins in the cell are synthesized at the same time, however, or even at the same rate, and a mechanism must exist by which one set of reactions may be made several hundred times more active than another. There is evidence that the proteins of the nucleus play a part in this controlling mechanism ' in particular, the basic proteins can be shown to have a suppressire action on some nucleic acid- induced reactions. There has consequently been a revival of interest in these proteins, and it is the object of this book to give an introduction to the current status of research in this field. The greater part of the book concerns the basic nuclear proteins. A chapter deals with the profamines - no dynamic function has yet been demonstrated for these proteins, and they may serve only as carriers for DNA. Histories, which are more complex, and which occur more widely in plant and animal tissues, are dealt with at greater len•h. Chapters are first devoted to classification and to methods of iso- lation. The spatial relationships between DNA and histones are discussed, and it is shown that histones may help to maintain the coiled structure of the nucleoprotein. Evidence for the concept of histones as gene modifiers is then reviewed, following from the observation that histones can block RNA synthesis in systems containing DNA. The growth and functions of cells in vitro are also inhibited by histones it is of interest that the antiviral substance, intefferon, is a histone-like protein. Chapters on the primary structure of histones, and on their biosynthesis and cata- bolism, complete this section. Work on acid proteins of •he nucleus has not yet developed to the same extent. A chapter describes the state of research on their isolation, amino acid content, and biosynthesis. Finally, the enzymes of the nucleus are reviewed, with particular reference to those involved in nucleic acid synthesis. Author and subject indexes are provided, and each chapter has an extensive list of references. The book provides a succinct review of the current position in a field which will certainly expand rapidly within the next few years. t3. G. OVERELL. ADVANCES IN HETEROCYCLIC CHEMISTRY. Vol. 3. Editor: A. R. Katritzky. Pp. xiii + 4:21 + Ill. (19•34). Academic Press, New York and London. 96/6. The third volume in this series contains three reviews devoted to specific groups of heterocyclic compounds and four reviews dealing with topics of general interest in heterocyclic chemistry. 57