Mr. Isaacs in his own person was a proof of the success of Jewish evangelization, and of its far-reaching consequences, and we would close this brief biography of our departed friend with the last words from his "Star of Peace":—
"When Isaac Da Costa arranged for the baptism of his children he was, in the providence of God, opening the floodgates of blessing for himself and family. The consequences were to be widespread as well as important. Up to that time, not one of his family in any of its branches had ever been brought out of Judaism into the full revelation in Christ of the Law and the Prophets. But when he closed his eyes, he left behind him the record of every member of his family but one, both on his own and on his wife's side, having embraced the Christian faith, and thus set their seal to the truth and inspiration of God's Holy Word."
Jacob, John, a Jew from Poland, was baptized in England, in the seventeenth century. In 1679 he wrote a tract under the title, "The Jew turned Christian, or The Corner Stone," which was translated into Dutch and published in Amsterdam, under the title, "Jesus de waare Hoeckstein." In this he magnifies the grace of God as manifested in and through Christ Jesus, by which alone fallen man can find acceptance in God's sight and realize perfect peace and salvation.
Jacobi, B. T., was born in Königsberg, 1807. His father went to England, and became a Christian there. During his absence his wife, not knowing at all about her husband's religious change, embraced Christianity, and was baptized with her four children. Jacobi studied theology, and was appointed Chaplain, at the George Hospital, Königsberg, having also the pastoral charge of the Workhouse, and giving religious instruction in a High School. From 1858 he was also acting as missionary of the British Society, and quite a number of Jews of the higher class were won by him for the Saviour. He was permitted to celebrate his ministerial Jubilee in 1877.
Jacobi, Karl Gustav Jakob, born at Potsdam, 1804, died at Berlin, 1851. He was a distinguished Professor of Mathematics at the University of Königsberg and Berlin from 1825, and, together with Abel, made his epoch-making discoveries in the field of elliptic functions. Most of Jacobi's papers were published in Crelle's Journal, "Für die Reine und Angewardte Mathematik," and in the "Monatsberichte" of the Berlin Academy of Sciences, of which he became a member in 1836. Of his independent works may be mentioned: "Fundamenta Novæ Theoriæ Functiones Ellipticorum," Königsberg, 1829; and "Canon Arithmeticus," Berlin, 1839. Jacobi's lectures on dynamics were published in Berlin in 1866 and 1884. The Berlin Academy of Sciences published his "Gesammelte Werke," 8 vols., 1881-91.
Jacobi, Heinrich Otto, born at Tutz, West Prussia, and educated in a Jewish school in Berlin. He was baptized by Pastor Hossbach. After teaching in several schools, he became Professor of Greek Philology at the Fried. Wilh. Gymnasium of Berlin in 1860. He wrote several treatises in the Greek language, and received the degree of D.Ph. from the University of Königsberg, even without passing an examination. He died in 1864.
Jacobsohn, S. S., born in German Ostrowo, 1810. He went to Berlin and studied painting in the Academy of Arts. After being an earnest enquirer for a year, he was baptized by Pastor Kunze in 1831. Two years later he entered the service of the Berlin Jewish Society, and laboured among the Jews until 1871, with great patience and love toward them, so that many acknowledged that he was a true Christian. He published a tract entitled, "Immanuel, die Erscheinung des Messias in Knechtsgestalt, seine Erlösungsthätigkeit und die Ausbreitung seines Reiches nach Jesaia" (Berlin).
Jacobson, Heinrich Friedrich, born in Morenwerder, 1804, died in 1868, as a true pious Christian, lamented by all who knew him. He became Ordinary Professor of Jurisprudence at the University of Königsberg in 1836. He was author, among other works, of "Geschichte der Quellen des Katholischen Kirchenrechts der Provinzen Preusen und Posen," (1839); likewise "Geschichte der Quellen des evangelischen Kirchenrechts," of the same provinces, (1844). His chief work was, "Das Evangelische Kirchenrecht des Preusischen Staates und seiner Provinzen," (Halle, 1862-66).
Jacobson, Jacob, was born at Goldingen, in the province of Courland, Russia. He tells his own story thus:—
"My parents early taught me to value the precepts, rites, and ordinances of Judaism, which they most rigidly observed. They therefore early placed me under the care of a Talmudical tutor, to be instructed in the Jewish faith, which consisted in the religious observances established by the authority of the Rabbis, and the promised reward to those who adhere to them.