ME: THOMAS SYDENHAM - thought it was important to have practical experience, detailed records of patients symptoms, believed disease could be classified, different types of disease could be found by observing patients symptoms, introduced laudanum for pain, iron for anaemia, quinine for malaria and differentiate measles and scarlet fever, wrote ‘medical observations’ (1676) a medical textbook used for 200 years, medical descriptions like gout to help doctors diagnose patients, made diagnosis more important part of a doctors work whereas before it was prognosis