62  PUBLICATIONS    OF    U.    S.    GEOLOGICAL    SURVEY,  [bull.  177. 
technology     [Vignette]     Washington     Government    Printing    Office 
1894 
8°.     viii,  810  pp.     Bound  in  black  cloth.     Price,  50  cents. 
Summary,  pp.  1-12. 
Iron  and  steel,  by  James  M.  Swank,  pp.  13-21'. 
Iron  ores,  by  John  Birkinbine,  pp.  23-49. 
Gold  and  silver,  by  R.  E.  Preston,  pp.  50-61. 
Copper,  by  C.  Kirchhoff,  pp.  62-88. 
Lead,  by  C.  Kirchhoff,  pp.  89-102. 
Zinc,  by  C.  Kirchhoff,  pp.  103-110. 
Quicksilver,  pp.  111-118. 
Manganese,  by  Joseph  D.  Weeks,  pp.  1 19-155. 
Aluminum,  pp.  156-167. 
Bauxite,  by  C.  W.  Hayes,  pp.  159-167. 
Nickel  and  cobalt,  pp.  168-177. 
Tin,  pp. 178-183. 
The  occurrence  of  tin  ore  at  Kings  Mountain  [North  Carolina],  by  Titus 
Ulke,  pp.  178-180. 
Antimony,  pp.  184-186. 
Coal,  by  E.  W.  Parker,  pp.  187-414. 
Pennsylvania  anthracite,  by  John  H.  Jones,  pp.  344-363. 
The  coal  fields  of  Wyoming,  by  G.  C.  Hewitt,  pp.  412-414. 
Manufacture  of  coke,  by  Joseph  D.  Weeks,  pp.  415-460. 
Petroleum,  by  Joseph  D.  Weeks,  pp.  461-533. 
Natural  gas,  by  Joseph  D.  Weeks,  pp.  534-541. 
Stone,  by  William  C.  Day,  pp.  542-602. 
Granite,  pp.  544-547. 
Marble,  pp.  547-549. 
Slate,  pp.  549-552. 
Sandstone,  pp.  552-555. 
Limestone,  pp.  555-557. 
Bluestone,  pp.  557-559. 
Exhibits  of  stone  at  the  World's  Columbian  Exposition,  pp.  560-602. 
Clay  materials  of  the  United  States,  by  Robert  T.  Hill,  pp.  603-617. 
Cement,  by  Spencer  B.  Newberry,  pp.  618-623. 
Soapstone,  pp.  624-626. 
Asphaltum,  pp.  627-669. 
Abrasive  materials,  by  E.  W.  Parker,  pp.  670-679. 
Buhrstones,  pp.  670-671. 
Grindstones,  pp.  671-672. 
Oilstones  and  whetstones,  pp.  672-674. 
Emery  and  corundum,  pp.  674-678. 
Infusorial  earth,  p.  678. 
Tripoli,  p.  679. 
Carborundum,  679. 
Precious  stones,  by  George  F.  Kunz,  pp.  680-702. 
Fertilizers,  pp.  703-712. 
Gypsum,  pp.  713-716. 
Salt,  by  E.  W.  Parker,  pp.  717-727. 
Natural  sodium  salts,  by  R.  L.  Packard,  pp.  728-738. 
Sulphur  and  pyrites,  by  E.  W.  Parker,  pp.  739-745. 
Fluorspar,  pp.  746-747. 
Mica,  by  E.  W.  Parker,  pp.  748-755. 
