176 BIBLIOGRAPHY 



Wald, G. 1936-1937 Pigments of the retina. II. Sea robin, sea bass, 

 and scup. /. Gen. Physiol., v. 20, p. 45. 



1937o Visual purple system in fresh water fishes. Nature^ v. 139, 



p. 1017. 



19376 Photo-labile pigments of the chicken retina. Nature, v. 140, 



p. 545. 



1938 On rhodopsin in solution. /. Gen. Physiol., v. 21, p. 795. 



1939a The porphyropsin visual system. /. Gen. Physiol., v. 22, 



p. 775. 



19396 Vitamin A and vision. Collecting Net, v. 14, p. 1. 



1942a The visual system and vitamin A of the sea lamprey. /. Gen. 



Physiol, V. 25, p. 331. 



19426 Visual systems and vitamins A. Biological Symposia, v. 7, 



p. 43. 



Wald, G., H. Jeghers, and J. Arminio. 1938 An experiment in human 

 dietary night-blindness. Am. J. Physiol., v. 123, p. 732. 



Wald, G., and D. Steven. 1939 An experiment in human vitamin A 

 deficiency. Proc. Nat. Acad., v. 25, p. 344. 



Walls, G. 1928 The photo-mechanical changes in the retina of mammals. 

 Science, v. 67, p. 655. 



■ 1932 Visual purple in snakes. Science, v. 75, p. 467. 



1934a The reptilian retina. Am. J. Ophthal., v. 17, p. 892. 



19346 Human rods and cones. Arch. Ophthal., v. 12, p. 914. 



1937 Significance of the foveal depression. Arch. Ophthal., v. 18, 



p. 912. 



1939a The significance of 'Kolmer's droplets' of the vertebrate 



retina. Anat. Rec, v. 73, p. 373. 



19396 Origin of the vertebrate eye. Arch. Ophthal., v. 22, p. 452. 



1940 Postscript on image expansion of the foveal clivus. Arch. 



Ophthal, V. 23, p. 831. 



1942a The vertebrate eye and its adaptive radiation. Cranbrook 



Inst. Sci., Bloomfield Hills, Michigan. 



19426 The visual cells and their history. Biological Symposia, v. 7, 



p. 203. 



Weigert, F. 1921 Ein photochemisches Modell der Retina. Arch. ges. 

 Physiol, Bd. 190, S. 177. 



