In Berlin, he published the two works for which he would become most renowned: the Introductio in analysin infinitorum, a text on functions published in 1748, and the Institutiones calculi differentialis, published in 1755 on differential calculus.
Di Berlin, ia menerbitkan dua karya yang membuatnya sangat terkenal: Introductio in analysin infinitorum, suatu teks mengenai fungsi-fungsi matematika diterbitkan pada tahun 1748, dan Institutiones calculi differentialis, diterbitkan pada tahun 1755 mengenai kalkulus diferensial.