00802cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040004500111050001700156100003600173245016500209260006100374300003200435490006900467650001700536650001400553999001700567gs 16000502 DLC20260227111319.0780331s1916    xx            000 0 eng c  ags 16000502   a(OCoLC)3768053  aLibrary, U.S. Geological SurveycOTdDLC00aTN490.A2bP71 aPratt, Joseph Hyde,d1870-1942.10aZircon, monazite and other minerals used in the production of chemical compounds employed in the manufacture of lighting apparatus,cby Joseph Hyde Pratt, PH.D.  aRaleigh, N.C.,bEdwards & Broughton printing co.,c1916.  a120 p.bmap, plans.c25 cm.0 aNorth Carolina. Geological and economic survey. Bulletinvno. 25 0aRare earths. 0aLighting.  c25687d25687