204 THE MOLECULAR ARCHITECTURE OF PLANT CELL WALLS 



(19) See refs. in Marsden, R. J. B. Crystalline and Amorphous Regions in 



Fibres. Fibre Science (Ed. Preston). Textile Inst. Mon., Manchester, 



1949. 

 Mhatre, S. H. Fine Structure of Cellulose Fibres with Special Reference 

 to Crystalline-amorphous Ratio. Ph.D. Thesis, Manchester, 1948. 



(20) Preston, R. D. Philos. Trans., B 224, 131, 1934. 



(21) Kreger, D. Nature, Lond., 158, 199, 1946. 



(22) Hengstenberg, J., and Mark, H. Z. Kryst., 69, 271, 1928. 



(23) Bragg, W. L. Proc. Roy. Soc, A 105, 370; A 106, 346, 1924. 

 See also Bunn, C. W. Chemical Crystallography, Oxford, 1945. 

 BUNN, C. W. In Fibre Science (Ed. Preston), Textile Inst. Mon., Man- 

 chester, 1949. 



(24) See (18). 



(25) Preston, R. D., and Singh, K. Journ. Exp. Bot. In Press, 1950. 



(26) Frey-Wyssling, A. Protoplasma, 35, 527, 1941. 



(27) Morey, D. K. Text. Res., 3, 325, 1933; 4, 491, 1934; 5, 105, 483, 538, 



1935. 



(28) Svedberg, T., and Pederson, K. O. The Ultracentrifuge, Oxford, 1940. 

 Alexander, A. P., and Johnson, P. Colloid Science, Clarendon Press, 



p. 239, 1949. 



(29) {a) Mark, H. High Polymers, vol. ii. Physical Chemistry of High 



Polymeric Substances. Interscience, N.Y., p. 258 et seg., 1940. 



(b) Meyer, K. H. High Polymers, vol. iv. Natural and Synthetic High 

 Polymers, p. 601 et seq., Interscience, N.Y., 1942. 



(c) Alexander, A. F., and Johnson, P. As in (28), Chap. 13. 



(30) Mark, H. In Physical Methods, vol. i (Ed. Weissberger), p. 135, 1945. 



(31) Haworth, W. N., and Machemer, H. J. Chetn. Soc, 2270, 2372, 



1932. 



(32) Johnson, P. In Fibre Science (Ed. Preston). Textile Inst. Mon., Man- 



chester, p. 99, 1949. 



(33) {a) Meyer, K. H. High Polymers, vol. iv. Natural and Synthetic High 



Polymers, Interscience, N.Y., 1942. 



(b) Frey-Wyssling, A. Submicroscopic Morphology of Protoplasm and 

 its Derivatives. Elsevier, Amsterdam, 1948. 



(34) Frey-Wyssling, A. Jahrb. wiss. Bot., 65, 195, 1926. 



(35) (a) AsTBURY, W. T., Preston, R. D. and Norman, A. G. Nature, 



136, 391, 1935. 

 {b) Preston, R. D., and Allsopp, A. Biodynamica, 53, 1, 1939. 



(36) {a) Anderson, D. B. Sitzungber. Akad. Wiss. Wien Math-Naturwiss., 1, 



136,429, 1927. 

 {b) Majumdar, G. p., and Preston, R. D. Proc. Roy. Soc, B 130, 201, 



1941. 



(c) Preston, R. D., and Duckworth, R. B. Proc Leeds Phil. Soc, 4, 



343, 1946. 



(37) Preston, R. D., and Middlebrook, M. /. Text. Inst., 4, 343, 1946. 



(38) Norman, A. G. See 3(a). 



(39) Brims, B. M. /. Counc Sci. Industr. Res. (Aust.), 20, 276, 1947. 



(40) See refs. in 41(a), and 



Preston, R. D. Biol. Revs., 14, 281, 1939. 



