sentences:  He published about twenty-five works with this object in view, two of which, the "Ma'aseTa'atuyim" (Vienna, 1887) and the "Yesod Mistere ha-'Akkum we-Sod Ḥokmat ha-Ḳabbalah" (ib.1888), have appeared in German translations also, the first as "Geschichte des Aberglaubens" (transl.by I. Stern, Leipzig, 1888) and the second as "Heidenthum und Kabbala" (Vienna, 1892).