Warman.]  TWENTY-FIRST    ANNUAL    REPORT.  33 
Pt.     VI.  Mineral  resources  of  the  United  States,  1899,  etc. — Continued. 
The  American  and  foreign  iron  trades  in  1899,  by  James  M.  Swank, 
general  manager  of  the  American  Iron  and  Steel  Association,  pp. 
69-118. 
Gold  and  silver,  pp.  119-127. 
Manganese  ores,  by  John  Birkinbine,  pp.  129-162. 
Copper,  by  Charles  Kirchhoff,  pp.  163-223. 
Lead,  by  Charles  Kirchhoff,  pp.  225-247. 
Zinc,  by  Charles  Kirchhoff,  pp.  249-266. 
Aluminum  and  bauxite,  pp.  267-271. 
Quicksilver,  by  Edward  W.  Parker,  pp.  273-283. 
Nickel  and  cobalt,  pp.  285-289. 
Antimony,  by  Edward  W.  Parker,  pp.  291-297. 
Tungsten,  molybdenum,  uranium,  and  vanadium,  by  Joseph  Hyde 
Pratt,  pp.  299-318. 
An  occurrence  of  tungsten  ore  in  eastern  Nevada,  by  F.  P>.  Weeks,  pp. 
319-320. 
Coal,  by  Edward  W.  Parker,  pp.  321-519. 
Pennsylvania  anthracite,  by  William  W.  Rnley,  pp.  484-492. 
Coke,  by  Edward  W.  Parker,  pp.  521-633. 
Index,  pp.  635-656. 
Pt.    VI    (Continued).    Mineral  resources  of  the  United  States,  1899;  nonmetallic 
products,  except  coal  and  coke,     viii,  634  pp. 
Petroleum,  by  1".  II.  Oliphant,  pp.  1-292. 
Natural  gas,  by  V.  II.  oliphant,  pp.  293-318. 
Asphaltinn  and  bituminous  rock,  by  Edward  W.  Parker,  pp.  319-332. 
Stone,  pp.  333   360. 
Clay,  pp.  361-392. 
Clays  and  clay  products  at  the  Paris  Exposition  of  1900,  by  Hein- 
rich  Ries,  pp.  .'Ki">-392. 
Portland  cement,  by  Spencer  B.  Newberry,  pp.  :;!t:;-406. 
American  rock  cement,  by  Uriah  Cummings,  pp.  407-411. 
Soapstone,  by  Edward  W.  Parker,  pp.  413-418. 
Precious  stones,  by  George  F.  Kunz,  pp.  419-461. 
Abrasive  materials,  by  Edward  W.  Parker,  pp.  463-479. 
Phosphate  rock,  by  Edward  W.  Parker,  pp.  481-502. 
Sulphur  and  pyrite,  by  Edward  W.  Parker,  pp.  503-522. 
Gypsum,  by  Edward  W.  Parker,  pp.  523-530. 
Salt,  by  Edward  W.  Parker,  pp.  531-554. 
Mica,  pp.  555-558. 
Fluorspar,  by  Edward  W.  Parker,  pp.  559-560. 
Asbestos,  by  Edward  W.  Parker,  pp.  561-564. 
<  iraphite,  pp.  565-568. 
Mineral  paints,  by  Edward  W.  Parker,  pp.  569-586. 
Barytes,  pp.  587-588. 
Fuller's  earth,  pp.  589-592. 
Feldspar  and  quartz,  by  Heinrich  Ries,  pp.  593-596. 
Mineral  waters,  by  A.  C.  Peale,  pp.  597-622. 
Index,  pp.  623-634. 
Pt.  VII.  Geography  and  geology  of  the  Black  and  Grand  prairies,  Texas,  with 
detailed  descriptions  of  the  Cretaceous  formations  and  special  refer- 
ence to  artesian  waters,  by  Robert  T.  Hill,  666  pp.,  71  pis.  and  maps. 
Bull.  177—01 3 
