Pompeii. 237 



poured over it in like manner until the paper is disengaged. The 

 sokuion of gum may then be applied, and the stone is ready for 

 printing; although its effect may be increased by a rebiting. 

 If chalk be used instead of ink, it must be previously softened by 

 the addition of a little tallow. 



We have no room for a description of what M. Senefelder calls 

 the wood-cut manner, the sprinkled manner, and the Indian ink 

 manner ; or for an account of his mode of printing in colours, 

 and in gold and silver. Leaving the elevated, we must content 

 ourselves with a very brief notice of the engraved manner of litho- 

 graphy. 



The stone, when it is intended to engrave upon it, must be 

 rubbed down as smooth as possible, and prepared with gum wa- 

 ter, which, however, must be immediately washed off. It should 

 then be covered by a fiat varnishing brush with a thin colour, 

 composed of a solution of gum and lamp-black or red chalk. 

 When perfectly dry, the drawing must be either traced or sketched 

 on the surface ; and the lines must then be all drawn in with an 

 etching needle, cutting through the covering coat, and entering 

 more or less deeply into the stone as a greater or less degree of 

 strength of shade is required. A soft ink, composed of thin var- 

 nish, tallow, and lamp-black, must then be rubbed over the sur- 

 face of the stone, into all the lines ; and immediately wiped off, 

 together with the original covering coat, by means of a woollen 

 rag dipped in gum-water. 



A drawing may also be etched on stone by a process similar to 

 that used in etching on copper. 



Some very curious and diversified processes of lithography are 

 also described by M. Senefelder, under the names of — Manner of 

 drawing with prepared or gum ink, the sprinkled aquatint man- 

 ner, the soft ground manner, &c. all of which exhibit very strik- 

 ing ingenuity, and deserve to be closely studied by those who are 

 desirous of obtaining proficiency in this new art. Instructions 

 are also given for printing- with oil and water colours at the same 

 time, for the application of the stone to calico-printing, for print- 

 ing oil-paintings by transfer, &c. We regret that although M. 

 Senefelder's recently invented stone paper, intended to supersede 

 the use of stone, is again mentioned, the mode of preparing it is 

 not specified; M. Senefelder, however, promises to make this the 

 subject of a separate work. 



I'ONfPEII. 



In prosecuting the excavations at PomiJcii, they have lately 

 discovered several edifices in the fine street that loads to the tem- 

 ples of Isis and Hercules, and to the Theatre. In a house sup- 

 posed to have belonged to some man of science, some surgical 

 instruments were found of excellent workmanship ; also some 

 paintings representing fruit and animals, executed with great 

 truth. 



