They both supply the aqueduct of Batchikeui, which, as has already been stated, furnishes the suburbs of Pera and Galata with water. Beyond Belgrade are other reservoirs which will be elsewhere noticed. These supply Constantinople proper, with water. " In order to a clear idea of the direction of these various convey hydraulic works, it may be advisable to follow each singly. Beyond Belgrade is a large bendt, which sends its waters into a basin already partially supplied from another reservoir. A mile farther on, the water is carried across two aqueducts, the larger of which is known as the aqueduct of Mustapha III. From this it is conveyed into the aqueduct of Justinian. This is twelve miles from Constantinople. It consists of two tiers of arches, each forty-two feet wide. The arches are four in number the total length of the aqueduct, with its abut- ;

ments, is seven hundred arid twenty feet, and its greatest height a hundred and ten feet. A gallery pierces the square pillars, forming the first story of arches, and allows a passage through its whole length. There are four small arches at each end of the first story, about twelve feet wide. The precise epoch of the construction of this aqueduct is not known, although it is commonly attributed to the Emperor Justinian II. This aqueduct receives also water from two others, the principal of which is known under the name of

Solyman. This is sixteen hundred feet long, and eighty feet high, and consists of two stories of fifty arches each. It is a Turkish work. Another aqueduct also conveys water into that of Justinian, and is generally supposed to be of the age of Constantine. It is