By the introduction of these compositions, the liturgy acquired an altered character. The translation of the portions of the Law which were read out to the congregation, and the Agadic expositions thereof, which, as the Jews of the Islamic empire adopted the Arabic language, had become unfamiliar to the multitude, gradually disappeared from the divine service, and their places were filled by metrical compositions (Piyutim) which answered the same purpose, and at the same time possessed the advantage of a poetical character. By this means considerable extension was given to the divine service. The reader supplanted the preacher. Singing was introduced into the synagogue, as the poetical prayers were not recited, but chanted (Chazanuth). Special tunes were introduced for the various prayers. But the _poetanic_ compositions were not adopted by all congregations as part of their divine service. The Talmudical authorities were at first opposed to their adoption, for the reason that they were usually interpolated between the various divisions of the principal prayer, and in this manner destroyed the continuity and coherence of its separate parts. The return to the source of the Bible had the result of kindling a poetic flame in artistic natures; but, at the same time, it fanned into existence a wild spirit which at first brought trouble, schism, and malediction in its train, although afterwards it became a source of purification, vigor, and blessing to the Jews. The origin of this movement, which divided the Jewish commonwealth of the east and west into two camps, dates from the first Gaonic century. The Babylonian Talmud held sway over the Jewish community in Babylonia; it was not only a code, but also the constitution for the community of which the Prince of the Captivity and the two presidents of the Talmudical colleges were the chief dignitaries. By the expansion of the Islamic dominion from India to Spain, from the Caucasus far down into Africa, the authority of the Talmud was extended far beyond its original bounds; for the most distant congregations placed themselves into communication with the Geonim, submitted points of religion, morals, and civil law to them for advice, and accepted in full faith their decisions, which were based on the Talmud. The Babylonian-Persian communities felt themselves in nowise hampered by the Talmudical ordinances, which were of their own creation, and had sprung up in their midst, the outcome of their views, morals, and customs, the work of their authorities. The African and European communities were too unlearned in the Bible and the Talmud to be able to express an opinion on the matter. They accepted the decisions of the Geonim as law, without greatly troubling themselves as to their agreement with the Bible.