warman  ]      NINETEENTH    AND    TWENTIETH    ANNUAL    REPORTS.  27 
Pt.  VI  (Continued).     Mineral  resources  of  the  United  States,  1897;  nonmetallic 
products,  except  coal  and  coke,     viii,  706  pp. 
Petroleum,  by  F.  H.  Oliphant,  pp.  1-166. 
Production  of  petroleum  in  Japan,  by  K.  Nakashima,  pp.  156-160. 
Natural  gas,  by  F.  H.  Oliphant,  pp.  167-185. 
Asphaltum,  by  Edward  W.  Parker,  pp.  187-204. 
The  production  of  an  asphalt  resembling  gilsoniteby  the  distillation 
of  a  mixture  of  fish  and  wood,  by  William  C.  Day,  pp.  202-204. 
Stone,  by  William  C.  Day,  pp.  205-309. 
The  Bedford  oolitic  limestone,  by  C.  E.  Siebenthal,  pp.  292-296. 
Soapstone,  by  Edward  W.  Parker,  pp.  311-315. 
Clay  statistics,  by  Jefferson  Middleton,  pp.  317-376. 
The  kaolins  and  fire  clays  of  Europe,  by  Heinrich  Ries,  pp.  377-467. 
The  clay- working  industry  of  the  United  States  in  1897,  by  Heinrich 
Ries,  pp.  469-486. 
Cement,  pp.  487-496. 
Portland  cement,  by  Spencer  B.  Newberry,  pp.  487-494. 
American  rock  cement,  by  Uriah  Cummings,  pp.  495-496. 
Precious  stones,  by  George  F.  Kunz,  pp.  497-514. 
Abrasive  materials,  by  Edward  W.  Parker,  pp.  515-533. 
Carborundum  in  1897,  by  E.  G.  Atcheson,  president  Carborundum 
Company,  p.  533. 
Phosphate  rock,  pp.  535-556. 
Review  of  the  land  and  river  pebble  phosphate  mining  industry, 
Florida,  for  the  year  1897,  by  C.  G.  Memminger,  pp.  543-545. 
The  phosphate  rock  deposits  of  Tennessee  during  1897,  by  Lucius  P. 
Brown,  pp.  547-555. 
Sulphur  and  pyrites,  by  Edward  W.  Parker,  pp.  557-576. 
Gypsum,  by  Edward  W.  Parker,  pp.  577-585. 
Salt,  by  Edward  W.  Parker,  pp.  587-612. 
Fluorspar,  by  Edward  W.  Parker,  pp.  613-617. 
Mica,  by  Edward  W.  Parker,  pp.  618-622. 
Asbestos, by  Edward  W.Parker,  pp.  623-626. 
Graphite,  pp.  627-631. 
Mineral  paints,  by  Edward  W.  Parker,  pp.  633-650. 
Barytes,  by  Edward  W.  Parker,  pp.  651-653. 
Fuller's  earth,  pp.  655-656. 
Quartz  and  feldspar,  p.  657. 
Mineral  waters,  by  A.  C.  Peale,  pp.  659-680. 
Mineral  resources  of  Hawaii,  pp.  681-686. 
Memorandum  on  the  mineral  resources  of  the  Philippine  Islands,  by 
George  F.  Becker,  pp.  687-693. 
Index,  pp.  695-706. 
Twentieth  Annual  Report  of  the  United  States  Geological  Survey 
to  the  Secretary  of  the  Interior  1898-99  Charles  D.  Walcott  Director 
In  seven  parts  Part  I. — Director's  report,  including  triangulation 
and  spirit  leveling  [Part  II. — General  geology  and  paleontology;  Part 
III. — Precious-metal  mining  districts;  Part  IV. — Hydrography  F.  H. 
Newell,  chief  of  division;  Part  V. — Forest  reserves  Henry  Gannett, 
chief  of  division;  Part  VI. — Mineral  resources  of  the  United  States, 
1898  Metallic  products,  coal,  and  coke  David  T.  Day,  chief  of  divis- 
ion; Part  VI  (Continued).— Mineral  resources  of  the  United  States, 
