1. A History of Chemistry
2. Ueber künstliche Bildung des Harnstoffs
3. Prior to publication, on 22 February 1828 Wöhler sent a letter to his friend and former teacher Berzelius informing him with unconcealed triumph that ‘ich Harnstoff machen kann, ohne dazu Nieren oder überhaupt ein Thier, sei es Mensch oder Hund, nöthig zu haben’ (I can make urea without needing kidneys or an animal at all, be it man or dog)