that has nothing to do with the historic fact of its existence. The many millions of people who use it from the day of their birth cannot be held responsible for any intentional neglect of grammatical rules, and its widespread dissemination is sufficient reason for subjecting it to a thorough investigation. A few timid attempts have been made in that direction, but they are far from being exhaustive, and touch but a small part of the very rich material at hand. Nor is this the place in which a complete discussion of the matter is to be looked for. This chapter presents only such of the data as must be well understood for a correct appreciation of the dialectic varieties current in the extensive Judeo-German literature of the last fifty years. All languages are subject to a continuous change, not only from within, through natural growth and decay, but also from without, through the influence of foreign languages as carriers of new ideas. The languages of Europe, one and all, owe their Latin elements to the universality of the Roman dominion, and, later, of the Catholic Church. With the Renaissance, and lately through the sciences, much Greek has been added to their vocabularies. When two nations have come into a close intellectual contact, the result has always been a mixture of languages. In the case of English, the original Germanic tongue has become almost unrecognizable under the heavy burden of foreign words. But more interesting than these cases, and more resembling the formation of the Judeo-German, are those non-Semitic languages that have come under the sway of Mohammedanism. Their religious literature being always written in the Arabic of the Koran, they were continually, for a long period of centuries, brought under the same influences, and these have caused them to borrow, not only many words, but even whole turns and sentences, from their religious lore. The Arabic has frequently become completely transformed under the pronunciation and grammatical treatment of the borrowing language, but nevertheless a thorough knowledge of such tongues as Turkish and Persian is not possible without a fair understanding of Arabic. The case is still more interesting with Hindustani, spoken by more than one hundred millions of people, where more than five-eighths of the language is not of Indian origin, but Persian and Arabic. With these preliminary facts it will not be difficult to see what has taken place in Judeo-German.