384 LITERATURE 



Harvey, E. N. and Danielli, J. F., 1936. (Films of proteins, elasticity.) J. cell. comp. 



Physiol. 8. 31. 

 Haurowitz, p., 1949. (Protein molecules, internal structure.) Experientia 5. 347. 

 Hausermann, E., 1944. (Intercellular spaces, wettability.) Diss. E. T. H. Ziirich. 

 Haworth, W. N., 1925. (Sugars, pyranose structure.) Nature 116. 430. 

 Haworth, W. N., 1929. The constitution of sugars. London. 

 Hecht, K., 1912. (Plasmolysis.) Beitr. Biol. Pfl. ii. 137. 

 Hegetschweiler, R., 1948. (Silk, double refraction.) Viertelj.schr. Naturf. Ges. Ziirich 



93- 57- 



Hegetschweiler, R., 1950. (Silk fibroin, optics.) Diss. E. T. H. Zurich; Makromol. 



Chem. 4. 156. 



Heidenreich, L. D. and Matheson, L. A., 1944. (Surface orientation, electron microsco- 

 pic studies.) J. appl. Phys. 15. 423. 



Heierle, E., 1935. (Pigments of leaves, spectrometric analysis.) Diss. E.T.H. Zurich. 



Heilbronn, a., 1914. (Cytoplasm, viscosity.) Jahrb. wiss. Bot. 54. 357. 



Heilbronn, a., 1922. (Cytoplasm, displacement of magnetic particles.) Jahrb. wiss. 

 Bot. 61. 284. 



Heilbrunn, L. v., 1930. (Cytoplasm, viscosity.) Protoplasma 8. 58. 



Heitz, E., 193 1. (Nucleoli, number.) Planta 12. 775. 



Heitz, E. 1932. (Chloroplasts, grana.) Planta 18. 616. 



Heitz, E., 1935. (Chromosomes, structure.) Z. indukt. Abstamm.- u. Vererblehreyo. 402. 



Heitz, E., 1936a. (Chloroplasts, structure.) Ber. dtsch. bot. 54. 362. 



Heitz, E., 1936b. (Chloroplasts, structure.) Planta 26. 134. 



Hengstenberg, J., 1928. (Intramolecular periods.) Z. Kristallogr. 67. 583. 



Hengstenberg, J. and Mark, H., 1928. (X-ray determination of particle size.) Z. Kristal- 

 logr. 69. 271. 



Hermans, P. H., 1938. (Deformation of gels.) Kolloid-Z. 83. 71. 



Hermans, P. H., 1941. (Swelling of gels.) Kolloid-Z. 97. 231. 



Hermans, P. H., 1946. Contribution to the physics of cellulose fibres. Monograph on the 

 progress of research in Holland during wartime. Amsterdam. 



Hermans, P. H., 1949. Physics and Chemistry of Cellulose Fibres. New York and 

 Amsterdam. 



Hermans, P. H. and De Leeuw, A. J., 1937, 1941. (Isotropic cellulose fibres.) Kolloid-Z. 

 8i. 300, 97. 326. 



Hermans, P. H. , Kratky, O. and Treer, R., 1941. (Gels, orientation during extension.) 

 KoUoid-Z. 96. 30. 



Hermans, P. H. and Vermaas, D., 1946. (Cellulose fibres, density.) J. Polymer Sci. i. 149. 



Hermans, P. H. and Weidinger, A., 1949. (Crystallinity of cellulose.) J. Polymer Sci. 

 4. 135. 



Herzog, R. O., 1927. (Cellulose „crystallits".) Handb. d. Textilfasern 7. i. Berlin. 



Hess, K., Kiessig, H. and Gundermann, J., 1941. (Cellulose crushed in ball mill.) 

 Z. phys. Chem. B. 49. 64. 



Hess, K., Kiessig, H., Wergin, W. and Engel, W., 1939. (Cell wall, formation.) Ber. 

 dtsch. chem. Ges. 72. 642. 



Hess, K., Trogus, C. and Wergin, W., 1936. (Meristems, „Primarsubstanz".) Planta 



25. 419. 



Heyn, a. N. J., 1931. (Cell elongation, optics.) Diss. Utrecht. 



Heyn, a. N. J., 1933. (Epidermis, X-ray analysis.) Proc. Acad. Sci. Amsterdam 36. 560. 



Heyn, A. N. J., 1934. (Meristems, X-ray analysis.) Protoplasma 21. 299. 



Hill, A. V., 1950. (Muscle, mechanics of contraction.) Nature 166. 415. 



HiLLiER, J., 1946. (Electron microscopy.) Bull. Amer. Ceramic Soc. 25. 438. 



