Observations on Mosaic, 297 



which confections are besprinkled. The whole is inclosed in 

 a kind of filigrane of copper, forming a rude design, Du- 

 fourny possesses a work of the Lower Empire executed with 

 cubes of enamelled copper. 



The Italians at present often employ antique mosaics to or- 

 nament the floors of their apartments ; and they make use of 

 a very ingenious process, before they remove the mosaic, for 

 fixing with cement the small cubes which compose it ; also for 

 detaching it from the place which it occupies, and for depo- 

 siting it in a new one. They cut it into portions, fix them 

 on large sheets of paper called perpeluo, surrounded with iron, 

 which they number, and afterwards, when they wish to make 

 use of them, they place the pieces on the floor according to 

 the numbers; and these portions, when joined, form a whole 

 as smooth as it was before the mosaic was displaced. 



The principal works which treat of the theory and practice 

 of mosaic are the following : — J. Ciampini, On the Mosaics 

 of Temples and other Buildings : Rom. 1690; fol. 2 vols. 

 Besides the mosaics the engravings of this work represent also 

 the temples constructed till the time of Constantine the 

 Great. — .T. Alex. Furietti, On Mosaics; Rom. 1752; 4to, 

 with plates. An extract from these two Latin works has been 

 published in French under the title, Essat sur la Peinture en 

 Mosa'iqne, par M. De Vielle : Buonarotti has also sppken of 

 them in his Observations on the antient Glass : Florence 1716: 

 4to. A dissertation on this subject, by G. Piacenza, may 

 be found in the first volume of his edition of Notizie dci 

 Prqfessori del Disegno da Cimalue : Tor. 1 768 ; 4to, 

 Fougeroux de Banderoix gives a Traite sur la Fahrique des 

 Mosdiques at the end of his Recherches sur les Ruines d'Hcr- 

 culaneum : Paris 1770; 8vo. Count Caylus speaks of them 

 in his Essai sur la Maniere de Peiiidre en Marhre^ in the 

 Memoirs of the Academy of Inscriptions, Vol. XXIX. In the 

 last place, M. Gurlitt has given a particular dissertation on 

 mosaic. 



The works which contain descriptions and explanations of 

 the most curious antique mosaics are : Opus Musivum erniiim 

 ex Ruderilus Villce Hadriani: Flor, 1779. The designs are 

 by C. Savorelli, and the engravings by Capellani. This 



Vol, IX. P p mosaic 



