Chap. 43.] CIIALAZIAN STOXE. .367 



that grape-juice 8 will absolutely cease to boil if puiuico is put 

 into it. 



CHAP. 43. (22.) STONES FOR MOUTAltS USKI> FOR MEDICINAL AN!> 

 OTIIEK rUKi'OSES. . KTKSIAX STONE. TUEBA1C STONE. CI1ALA- 

 21 AN STONE. 



Authors, too, have paid some attention to the stones in use 

 for mortars, not only those employed for the triturution of 

 drugs and pigments, but for other purposes as well. In this 

 respect they have given the preference to Etesian* stone before 

 nil others, and, next to that, to Thebaic stone, already men- 

 tioned 5 as being called " pyrrhopcecilon," and known as " psa- 

 ranus " by some. The third rank has been assigned to chry- 

 sites, e a stone nearly allied to Chuluzian 7 stone. For medicinal 

 purposes, however, bosanites* has been preferred, this being a 

 stone that remits no particles from its surface. 9 



Those stones which yield a liquid, are generally looked upon 

 as good for the triturution of ophthalmic preparations; and 

 hence it is, that the. ./Ethiopian stone is so much in request for 

 the purpose. Tienarian stone, they say, Phoenician stone, and 

 luematites, are good for the preparation of those medicinal 

 compositions in which saffron forms an ingredient; but they 

 also speak of another Tienarian stone, of a dark colour, which, 

 like- Parian 10 stone, is not so well adapted for medicinal pur- 

 poses. We learn from them, too, that Egyptian alubastrites, 11 

 or white ophites, 12 from the virtues inherent in them, are con- 

 sidered still better adapted for these purposes than the kinds 

 last mentioned. It is this kind of ophites, too, from which 

 vessels, and casks even, are made. 



s " Musta." Grape-juice in the process of being made into wine. 



4 Delafosse sutr^ests that this may have been grey-spotted granite. 

 The name is doubtful, as 4t Kdesian" and Kphesian" are other readings. 



5 Jn Chapter 13 of this Book. 



6 '* Golden stone " A variety, perhaps,, of the Thebaic stone with gold 

 spots, mentioned in Chapter 13 of this Uook. 



7 Possibly so called from XaXo^a, " hail," it beinp, perhaps, a granite 

 with spots like )iail*tonc*. * See Chapters 11 and 38 of this Look. 



9 In consequence of its extreme hardness. 



10 IMicuiiiciun btnc and Ticnariau stone do not appear to have tatn 

 identified. Parian stone mav probably have been white 1'ariaii marble. 



11 See Chapter J2 of this Uuok. 



52 Serpentine. See Chapters 11 and 30. 



