Emil Feer, pioneer-pediatrician of Switzerland, whose name is connected with the first monographic presentation of acrodynia, published this sixth edition of his Diagnosis of Children's Diseases at the age of 86 years. His capacity to combine historical knowledge with the evaluation of recent research reminds one of Abraham Jacobi and Isaac Abt.
Since the first edition (1921), the number of pages has increased from 275 to 461, the number of partly coloured illustrations from 226 to 285.