Acknowledgements 



My thanks are due to the following who have very kindly provided me 

 with original photographs for plates: Mr. H. J. Woods (Plates 1 and 2), 

 Dr. K. M. Rudall (Plate 3), Mr. M. S. C. Birbeck (Plates 5B and 10B), 

 Dr. G. E. Rogers (Plate 16), Dr. I. Brodv (Plate 17) and Dr. I. Heiger 

 (Plate 22A). 



The following publishers and societies have granted permission to 

 reproduce figures from their publications : 

 The Royal Society 



(Proceedings of the Royal Society, Philosophical Transactions of the 

 Royal Society) 

 The Textile Institute 



(Journal of the Textile Institute) 

 Rockefeller Institute for Medical Research 



(Journal of Biophysical and Biochemical Cytology, Journal of General 

 Physiology) 

 Macmillan & Co. 



(Nature) 

 Elsevier Publishing Co. 



(Biochimica et Biophysica Acta) 

 North-Holland Publishing Co. 



(Mechanical Properties of Fibres) 



Cambridge University Press 



(Journal of Endocrinology, An Introduction to Comparative Bio- 

 chemistry (3rd edition) 



Athlone Press 



(Lectures on the Scientific Basis of Medicine) 



Society of Dyers and Colourists 

 (Fibrous Proteins) 



Almquist and Wiksell 



(Proceedings of the International Conference on Electron Microscopy, 

 Stockholm 1956) 

 Society Cosmetic Chemists, London 



(Journal of the Society of Cosmetic Chemists) 



