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We mud here add the Ludus He^.montii^ 

 or Waxen Veins, as they are often called. 

 This Stone confifls of feveral Pebbles 

 bedded in a Mafs of pure Earth, which 

 is grown to the Hardnefs of a Stone. It 

 is to be obferved, that the Matter which 

 forms the Bed, and by which the Peb- 

 bles are fo ftrongly joined and cemented 

 together, is of a purer Nature than the 

 Pebbles themfelves are. This is not un- 

 frequently found in many Parts of Eng- 

 land^ and is of confiderable Value. The 

 Matter by which thefe Pebbles are join- 

 ed, is ufed in Medicine in Nephritic 

 Complaints. 



Under this Title are depofited a hu- 

 man Skull and a Sword, both of which are 

 completely covered over and incrufted 

 with the fame ftony Subftance to a confi- 

 derable Thicknefs, yet without lofing 

 their Form. They were found in the 

 ^jl?er at Rome, 



JEtileSj Eagle Stones. Pliffy the Na- 

 turalift fays, that Eagles cannot hatch 



their 



