Sir Frederic Still considered this work “the most progressive which had yet been written”; it gave an impetus to research which influenced the future course of pediatrics. Rosén was particularly interested in infant feeding. The Underrättelserwere originally published in the calenders of the Academy and were later collected and issued in book form in 1764. English and German translations in 1776. For a biography, bibliography, and essays on this book, see Nils Rosen von Rosenstein and his textbook on paediatrics, ed. B. Vahlquist and A. Wallgren. Acta paediat., 1964. Suppl. 156.