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								  Spain
								    first day cover features a cachet and stamp showing Wilhelm Conrad
								    Roentgen, the discoverer of the X-ray. The
							      stamp was issued to commemorate the first European Congress of Radiology.  
								  ** 
								   IV-05 1967 Spain stamp commemorates the first European Congress of Radiology. The stylized portrait of Roentgen is accompanied by a modern X-ray tube and the atomic symbol.  
					                
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								  Médecine 
                                     3534 : Santiago Ramon y Cajal (histologiste) Prix Nobel en 1906  
  avec Camillo Golgi (structure du système nerveux) 
  3535 : Severo Ochoa (biochimiste) Prix Nobel en 1906  
  avec Arthur Kornberg (mécanisme de la synthèse biologique de l'ADN) 
								   
								  
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