2IS oyr STONY AND METALLINE SUBSTANCES 



Specula Phgfico-mathematica Iliftoriana ;* the Fifica Sotterranea 

 of Giacinto Gemma ; the works of Pliny, and others might 

 be referred to. 

 Dr. Chaldni on Doctor Chaldni, in his Obfercatiom on the Mafs of Iron 

 the Siberian hoaj- omd ,-„ Siberia, and ou other Mafes of the like kind, as well 

 as in his Obfervations on Fire-balls and hard Bodies fallen from 

 the Atmnfpherc, has collected almoft every modern inftance of 

 phenomena of this nature. 

 M« Southey a Mr. South ey relates an account, juridically authenticated, 

 tfone wt. j- a ft one weighing 10 lb. which was heard to fall in Portugal, 



Feb 19, 1796, and was taken, ftill warm, from the ground. f 

 Abbe Bachelay The firft of thefe peculiar fubftances with which chemiftry 

 ?7 68 » has interfered, was the ftone prefentedby the Abbe" Bachelay 



to the Royal French Academy. It was found on the 13th of 

 September, 1768, yet hot, by perfons who faw it fall. It is 

 defcribed as follows : 



" La fubftance de cette pierre eft d'un gris cendre* pale ; 

 P lorfqu'on en regarde le grain a la loupe, on appereoit que 

 f« cette pierre eft parfem£e d'une infinite de petits points bril- 

 f Jans metelliques, d'un jaune pale ; fa furface exterieiire, 

 " celle qui, fuivant M. PAbbe Bachelay, n'etoit point en- 

 " gag£e dans la terre, etoit couverte d'une petite couche tres- 

 " mince d'une matiere noire, bourfoufflee dans des endroits, 

 " et qui paroiffoit avoir ete fondue. Cette pierre, frappee 

 • f dans Pinterieur avec Pacier, ne donnoit aucune etincelle ; 

 U ft on frappoit, au contraire, fur la petite couche exterieure, 

 £< qui paroiflbit avoir £te attaquee par le feu, on parvenoit 

 " a en tirer que'ques-unes." 



The fpecific gravity of this ftonewas as 3535 to 1000. 

 Analyzed. The academicians analyzed the ftone and found it to con- 



tain. 



Sulphur - - - - 8| 

 Iron , 36 



Verifiable earth 55% 



100. 



* Fol. 1696, Vol. I. p. 385. where a long enumeration of ftone» 

 fallen from the flcy is given. 



+ Letters written during a fliort refideuce in Spain and Portugal,, 

 p. 239. 



Of 



