1 14 On the CombinatloHs ef Metals with Sulphur. 



With this view I pointed out this preparation for the mafonry of the inner faces -of the 

 canal of Saone-et- Loire, which were precifely in this condition, and near which there were 

 confiderable raafles of this matter afforded by the fires of a glafs-houfe. 



ADDITION. 



Citizen Monge, who vifked the ruins of Cefarea, of which the hidorian Jofephus has 

 given fo magnificent a defcripaon (Cxfarea Stratonis) at prefent abiblutely without inhabi- 

 tants, afTures me, that he could diflinguifli in its ruins, by the tafle of the architedure and 

 the folidity of the mortar, the different ages of the firft conftru£lion, and the works fuc- 

 ceflivcly added after the invafion of the Arabs, and during the Crufades. 



" He obferved on the fide of the gate at prefent in ruins, the remains of a temple con- 

 fecrated to Auguftus. Endeavours had been made to fupport the walls in front by coun- 

 terforts ftill in being, which in fome places exhibited a concave mould or imprefTion of 

 ornaments of an exquifite tafle formed of mortar, which had applied itfelf againfl reliefs 

 which arc now no longer in being. 



The flone of the original flru£ture was corroded by the weather to a great depth, and 

 the mortar projected out beyond it. 



He attempted in vain to break off a piece. It was of a very fine and equal texture, ap- 

 parently compofed of fine fand and very little lime well blended together. 



I thought that this obfervation might be received with pleafure at the end of the prefent 

 memoir. 



VI. 



On the Combinations of the Metals -with Sulphur, iy CiT. Vaui^UELIH*. 



Wi 



E may divide the combinations of the metals with fulphur into three orders, namely, 

 firft metals and fulphur, which are combinations properly denominated metallic fulphurets, 

 or fulphurated metals. Nature and art prefent many famples of this kind. a. Metallic 

 cxides and fulphur ; thefe ought to be called fulphurated metallic oxides, or oxided metallic 

 fulphurets. They are alfo very common in nature. 3. Metallic oxides with fulphur and 

 hydrogen. Thefe triple combinations are called metallic hydro-fulphurated oxides. 



If the fubflance which predominates in thefe different combinations be taken as the bafe 

 of the nomenclature, we fhould reverfe the order of the common denominations; for in 

 the fimple fulphurets the mafs of metal always predominates, and fo likewife in the ful- 

 phurated oxides ; but in the hydrc-fulphurets at firfl the metals, then the fulphur, and 

 afterwards the hydrogen predominate. 



• Annales de Chymie, XXXVII. 57, 



So 



