In the first years of his American rabbinate, Jastrow ably seconded the efforts of Leeser to preserve conservative Judaism in the East against the advance of radical Reform, and continued to oppose that tendency after Leeser’s death. Jastrow was one of the professors of Maimonides College, and later collaborated with Szold in the revision of the “Siddur Abodat Israel” and in its translation into English. Besides his activity in local Jewish affairs and in other Jewish matters of a more general nature, he contributed to many European and American Jewish periodicals and was for several years the chief editor of a new translation of the Bible into English, which was undertaken under the auspices of the Jewish Publication Society of America. He also found time to compile his great work, “A Dictionary of the Targumim, the Talmud Babli and Yerushalmi, and the Midrashic Literature” (London and New York, 1886–1903), and in his last years was editor of the department of the Talmud in the “Jewish Encyclopedia.” Two of his sons are renowned American scholars. The older, Prof. Morris Jastrow (b. in Warsaw, 1861), has occupied the chair of Semitic languages at the University of Pennsylvania since 1892, and is one of the foremost Orientalists in the country. The younger, Joseph Jastrow (b. in Warsaw, 1863), has been prof. of Psychology at the University of Wisconsin since 1888, and a recognized authority on his special subject. He was in charge of the psychological section of the World’s Columbian Exposition in Chicago in 1893, and served as president of the American Psychological Association for the year 1900. Illustration: Dr. Marcus Jastrow. Photo by Gutekunst, Phila.