. Electron microscopy; proceedings of the Stockholm Conference, September, 1956. Electron microscopy. 196 References G. LION, C. MAERTENS AND G. VANDERMEERSSCHE 1. De Robertis, E., /. Biophys. Biochem. Cytol. 2. 319 (1956). 2. De Robertis, E. and Franchi, C. M., /. Biophys. Biochem. Cytol. 2, 307 (1956). 3. Sjostrand, F. S., /. Cell. Comp. Physiol. 33, 383 (1949). 4. — ibid. 42, 15 (1953). 5. — ibid. 42, 45 (1953). 6. — /. Appl. Phys. 24. 1422 (1953). 7. — unpublished. 8. SvAETiCHiN, G., Acta Physiol. Scand. 39, Suppl. 134. 17^6 (1956). Submicroscopic Morphology of the Retinal Pigment Epitheli


. Electron microscopy; proceedings of the Stockholm Conference, September, 1956. Electron microscopy. 196 References G. LION, C. MAERTENS AND G. VANDERMEERSSCHE 1. De Robertis, E., /. Biophys. Biochem. Cytol. 2. 319 (1956). 2. De Robertis, E. and Franchi, C. M., /. Biophys. Biochem. Cytol. 2, 307 (1956). 3. Sjostrand, F. S., /. Cell. Comp. Physiol. 33, 383 (1949). 4. — ibid. 42, 15 (1953). 5. — ibid. 42, 45 (1953). 6. — /. Appl. Phys. 24. 1422 (1953). 7. — unpublished. 8. SvAETiCHiN, G., Acta Physiol. Scand. 39, Suppl. 134. 17^6 (1956). Submicroscopic Morphology of the Retinal Pigment Epithelium G. Lion, C. Maertens and G. Vandermeerssche Centre de Micioscopie Electronique, Medical, Industrie! et Agricole, Briissels-Uccle The aim of the present work is to bring out the possibilities and Hmitations of the electron micro- scope in a study of the fine structures of the eye. One of the present authors has done some work with the Philips electron microscope Type EM 100 (1); this work was done in collaboration with the Chnique Ophtalmologique of the University of Ghent and was solely concerned with suspension and replica techniques. A comprehensive study of the different ocular tissues, but this time by means of the thin-sections technique, has been undertaken by the present authors. Two different types of electron microscopes are being used: the Philips EM 75 and the new type EM 100. The work done with the first electron micro- scope will be presented here while the rest of this work will be published elsewhere. Material has kindly been provided by the Institut d'Hygiene et d'Epidemiologie of the Ministry of Public Health, Brussels. The eyes of the following animals have been studied: monkey (M. Cynoiuol- gus), guinea pig and pig. It has thus been possible to bring out differences in structural details of the eyes of these animals and those studied by several other workers (1-4, 9-12) in this field (man, guinea pig, carp, perch, ox, frog). Our investigations were


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