rARMAN.l  MINERAL    RESOURCES    FOR   1892.  61 
Lead,  by  C.  Kirchhoff,  pp.  121-129. 
Zinc,  by  C.  Kirchhoff,  pp.  130-138. 
Quicksilver  ore  deposits,  by  George  F.  Becker,  pp.  139-168. 
Manganese,  by  Joseph  D.  Weeks,  pp.  169-226. 
Aluminum,  by  Alfred  E.  Hunt,  pp.  227-254. 
Nickel  and  cobalt,  pp.  255-257. 
Tin,  pp.  258-259. 
Antimony,  pp.  260-262. 
Coal,  by  E.  W.  Parker,  pp.  263-550. 
The  coal  deposits  of  California,  by  H.  W.  Turner,  pp.  308-310. 
Coal  fields  of  Colorado,  by  R.  C.  Hills,  pp.  319-365. 
Sketch  of  the  coal  deposits  of  Iowa,  by  Charles  R.  Keyes,  pp.  398-404. 
Pennsylvania  anthracite  production,  by  John  H.  Jones,  pp.  457-476. 
The  Tennessee  coal  measures,  by  J.  M.  Safford,  State  geologist,  pp.  497-506. 
The  coal  fields  of  Texas,  by  Robert  T.  Hill,  pp.  507-510. 
Coal  fields  of  Utah,  by  Robert  Forrester,  pp.  511-520. 
The  improvement  of  the  Great  Kanawha  River,  West  Virginia,  by  Col.  W.  P. 
Craighill,  corps  of  engineers,  pp.  540-546. 
The  manufacture  of  coke,  by  Joseph  D.  Weeks,  pp.  551-602. 
I VI  roleum,  by  Joseph  D.  Weeks,  pp.  603-651. 
Natural  gas,  by  Joseph  I).  Weeks,  pp.  652-698. 
Asphaltum,  by  E.  W.  Parker,  pp.  699-703. 
Stone,  by  William  C.  Day,  pp.  704-711. 
Granite,  pp.  705-709. 
Marble,  pp.  709-710. 
Slate,  p.  710. 
Sandstone,  pp.  710-711. 
Limestone,  p.  711. 
Clay  materials  of  the  United  States,  by  Robert  T.  Hill,  pp.  712-738. 
Natural  and  artificial  cements,  by  Spencer  B.  Newberry,  pp.  739-747. 
Abrasive  materials,  by  E.  W.  Parker,  pp.  748-755. 
Buhrstones,  pp.  748-749. 
Grindstones,  p.  749. 
Oilstones  and  whetstones,  pp.  750-751. 
Emery  and  corundum,  pp.  751-752. 
Infusorial  earth,  p.  752. 
Tripoli,  pp.  752-753. 
Recent  inventions,  pp.  753-755. 
Precious  stones,  by  George  F.  Kunz,  756-781. 
Phosphate  rock,  pp.  782-784. 
Sulphur,  by  E.  W.  Parker,  pp.  785-791. 
Salt,  by  E.  W.  Parker,  pp.  792-800. 
Gypsum,  pp.  801-804. 
Fluorspar,  p.  805. 
Graphite,  pp.  806-807. 
Asbestos,  by  E.  W.  Parker,  pp.  808-812. 
Soapstone,  pp.  813-814. 
Mineral  paints,  pp.  815-820. 
Barytes,  pp.  821-822. 
Mineral  waters,  by  A.  C.  Peale,  pp.  823-834. 
Index,  pp.  835-850. 
Department  of  the  Interior    United  States  Geological  Survey  «1 .  W. 
Powell  Director     Mineral  resources  of  the  United  States     Calendar 
year  1893     David  T.  Day  chief  of  division  of  mining  statistics  and 
