[ 243 ] 



91. Stibium. JGreyiih- white; very brittle ; of a lamellar 



and rad.iated texture ; melting in a red 

 heat, and becoming firfl a greyiOi-whitc 

 oxyde, afterwards an hyacinthine glals, 

 and at laft evaporating in a white vapour; 

 depofiting a white precipitate if its folution 

 in n3,uriatic acid be diluted with water; 

 rpecific gravity 6,702. 



92. Tellurium. Blueil^-whixe; very brittle; of a laminar 



^exture,; eafily melting, and boiling and 

 evaporating if the heat be increafed ; burn- 

 lA.!^ before the blp.wpipe with a lively blue 

 flame the edges of which are green, and at 

 lad evaporating in a white fmoke ; depo- 

 fiting a white precipitate if its folution in 

 niij-g. muriatic acid be largely diluted with 

 waiter: fpecific gravity 6,115. 

 ,93. Arsenicum. plueifh-white; extremely brittle ; fubliming 



in a white powder in a moderate heat with- 

 out melting, &:emittinga {IrongfmcU refem- 

 .bllng garlic ; its fublimcd powder giving its 

 fgluiloii in water an acid tafte, and turnin* 

 vegelable blues red: fpecitic gravity 8,310. 



94. JCqbaltum. 131ucilh-grey with often a fliadeof red, hard- 



iih, very bri.i,tle ; melting with ditBculty, 

 burning in a violent heat with a red flame; 

 attracted by the magnet ; giving a red co- 

 lour to its folution in nitric acid, and pre- 

 cipitating a blue powder with the addition 

 ofpptafs: fpecific gravity 8,150. 



95. Magnesium. Iron-grey or brown, opake, hard, very 



brittle, melting with great difficulty ; at- 

 tracted by the magnet when reduced to 

 powder; mixed with nitre and expofed a 

 fufficient time to heat, the mixture when 

 thrown into water exhibiting a green, then 

 a purple, then a fcarlet colour, all which 

 at lafi difappear : fpecific gravity 7,000. 

 .96. Tujs'CSTENUM. Brownidi-red, internally blueifh, brittle, ex- 

 tremely hard; not attracted by the magnet; 

 • melting with great difficulty, when heated 

 is gradually converted from a black to a yel- 

 low oxyde, which aflTumes a blue colour with 

 the muriatic acid; fpecific gravity 17,600. 

 H h 2 



