Calendar: 1961-1962 Page 457

lxxvi ANNUAL REPORT Price Bralsford and Harris The effect of fluorine substitution in the ionization potentials and spectra of molecules European Molecular Spectroscopy Symposium Bologna 1960 Price Molecular Electronic Spectroscopy Annual Phys Chem Vol II 1960 Ralph Catholuminescence spectra of diamonds Proc Phys Soc In press Richards Β and Atkin Ν The difference between normal and cancerous tissues with respect to the ratio of DNA content to chromosome numbers Univ Intern Contra Cancrum Acts XVI 1960 124 "DNA content of human tumours change in uterine tumours during radiotherapy and their response to treatment Brit Cancer XIII 1959 788 Richards Β Redistribution of nuclear protein during mitosis י In The Cell Nucleus Butterworths London 1959 Sherman Price and Wilkinson Infra-red studies on polyatomic ions isolated in alkali halides Spectrochim Acta July 1960 Silvester Densitometer wedge for measurements of low optical densities Sci Inst 37 1960 33 Silvester and Burge quantitative estimation of the uptake of two new electron stains by the cytoplasmic membrane of ram sperm Biophys Biochem Cyt 1959 179 Spencer and Worthington hypothesis of contraction in striated muscle Nature 187 1960 388 Sykes Some counting theorems in the theory of the ising model and the excluded volume problem Submitted to Journal of Mathe- matical Physics Walker Μ and Richards Β Quantitative microscopical techniques for single cells Chapter Vol in The Cell ed Brachet and Mirsky Academic Press New York 1959 Wilkins Μ Zubay and Wilson X-ray diffraction studies of the molecular structure of nucleo- histone and chromosomes י' Mol Bid 1959 179