The present state of Turkey : or, a description of the political, civil, and religious constitution, government, and laws, of the Ottoman Empire, the finances, military and naval establishments, the state of learning, and of the liberal and mechanical arts, the manners and domestic economy of the Turks and other subjects, of the Grand Signor, &c., &c., together with the geographical, political, and civil, state of the principalities of Moldavia and Wallachia, from observations made, during a residence of fifteen years in Constantinople and the Turkish Provinces / by Thomas Thornton, Esq.