Schwarz was a member of the pious Watikin sect. As a result, his first work in Jerusalem was to observe from the
Mount of Olives the exact times of sunrise and sunset for each day of the year. The time of sunrise and sunset determines the time for the Watikin's
Shma Yisrael prayer. This work was published in Jerusalem in 1843 under the title ''Tvu'ot Hashemesh'' (άבואות השמש The Cycles of the Sun). Schwarz traveled to Palestine for 15 years at his own expense and explored its geography. A thorough knowledge of the local languages helped him in this arduous and often dangerous undertaking. He published the results of these trips in his book ''Tvu'ot Ha'aretz'' (άבואות הארר), which was published in
Hebrew in Jerusalem in 1845. In 1849 Schwarz went to the US and took care of the translation and publication of this book there. In addition, he collected donations as a
Meshullach for the Kollel Hod. The book was translated into English by
Isaac Leeser and published in 1850 under the title
A descriptive geography and brief historical sketch of Palestine, by Rabbi Joseph Schwarz, for sixteen years a resident in the holy land. The costs of the publication were borne by the publisher A. Hart. From the US, Schwarz travelled via London to Germany, where he supervised the translation into German and the publication of his book. In 1852, his book, under the title
Das heilige Land: Nach seiner ehemaligen und jetzt geographischen Beschaffenheit was published by the publishing house of the Hebrew antiquarian bookstore of I. Kaufmann,
Frankfurt am Main. The book contains geographical studies that show the names of localities, mountains, countries, rivers, etc., found in the Bible, Talmud and Midrash, not only in Palestine, but also in its surroundings, for example, in
Lebanon, which was inhabited in the 19th century. Assign common names in the XIX century. In addition, it also contains explanations of the names of peoples; explanations of the animal kingdom, plant kingdom,
mineral kingdom and
climate; descriptions of the
liturgical, religious and
social customs of the Jews in Jerusalem; various legends and sketches on the history of the Jews in Palestine; and descriptions of the
Arab population of Jerusalem. At the end of the book there is a detailed register of all occurring place names and other terms in German and Hebrew, a picture of Jerusalem and a map of Palestine. After 1852, Schwarz returned to Jerusalem. There he continued his studies of the rabbinic scriptures and
Kabbalah, and joined the Kabbalistic association Beth-El. == Gallery ==