Writing mainly in German, Meisl made considerable contributions to Jewish historiography. His works include: Geschichte der Juden in Polen und Russland (3 vols., 1921–25); Haskalah, Geschichte der Aufklaerungsbewegung unter den Juden in Russland (1919), a history of the Haskalah movement in Russia; and Die Juden im Zartum Polen (1916). He also wrote studies on well-known Jewish historians: H. Graetz (1917), S. Dubnow (1930), and his father-in-law S. P. Rabbinowitz (Heb., 1943). In 1939 he published his study of Sir Moses Montefiore's (abortive) endeavors to raise the educational and economic standards of Jerusalem Jewry, while his important edition of the minutebooks of the Berlin Jewish Community, 1723–1854 (Pinkas Kehillat Berlin) was published posthumously in 1962 by Shaul Esh. Meisl was a coeditor of the Festschrift zu S. Dubnows siebzigstem Geburtstag (1930).