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pyrognostics

N คุณ สมบัติ ของ แร่ เมื่อ ถูก ความร้อน 

 

Webster's 1913 Dictionary

PYROGNOSTICS

PYROGNOSTICS Pyr `og *nos "tics, n. pl. (Min. )

 

Defn: The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc.