CONTENTS.  5 
Portland,  natural,  and  Puzzolan  cem ents 374 
Tennessee-Virginia: 
Cement  resources  of  the  Cumberland  Gap  district,  by  E.  C.  Eekel. 37  I 
Washington: 
Cement  resources  of  Washington,  by  Henry  Landes 377 
Survey  publications  on  Portland,  natural,  and  puzzolan  cements 384 
Lime  and  magnesia 385 
California: 
Some  magnesite  deposits  of  California,  by  F.  L.  Hess. 385 
Maine: 
The  lime  industry  of  Knox  County,  by  E.  S.  Bastin 393 
Gypsum  and  plasters 101 
Colorado : 
Gypsum  of  the  Uncompahgre  region,  by  C.  E.  Siebeilthal 401 
Wyoming: 
Gypsum  deposits  of  the  Laramie  district,  by  C.  E.  Siebenthal 404 
Survey  publications  on  gypsum,  salt,  borax,  and  soda 406 
Clays 407 
Arkansas : 
Clays  of  Garland  County,  by  E.  C.  Eckel 407 
Kentucky-Tennessee : 
Clay  resources  of  northeastern  Kentucky,  by  W.  C.  Phalen _■ 412 
Clays  of  western  Kentucky  and  Tennessee,  by  A.  F.  Crider 417 
Maine: 
Clays  of  the  Penobscot  Bay  region,  by  E.  S.  Bastin 428 
Massachusetts : 
Clays  of  Cape  Cod,  by  M.  L.  Fuller 432 
Penns3dvania: 
Notes  on  clays  and  shales  in  central  Pennsylvania,  by  G.  II.  Ashley 442 
Wyoming: 
Bentonite  of  the  Laramie  basin,  by  C.  E.  Siebenthal 445 
Survey  publications  on  clays,  fuller's  earth,  etc 448 
Building  stone  and  road  metal 449 
Maine: 
Note  on  a  new  variety  of  Maine  slate,  by  T.  N.  Dale 449 
Survey  publications  on  building  stone  and  road  metal 451 
Glass-making  materials - 452 
General : 
The  requirements  of  sand  and  limestone  for  glass  making,  by  E.  F.  Burchard .        152 
Mississippi  basin: 
Glass  sand  of  the  middle  Mississippi  basin,  by  E.  F.  Burchard 459 
West  Virginia: 
The  glass-sand  industry  in  eastern  West  Virginia,  by  G.  W.  Stose -173 
Miscellaneous  nonmetals - 176 
Colorado: 
Volcanic  ash  near  Durango,  by  L.  H.  Woolsey 470 
Maine : 
Graphite  in  Maine,  by  G.  O.  Smith 480 
Survey  publications  on  mica,  graphite,  abrasive  materials,  etc Is  I 
Survey  publications  on  sulphur  and  pyrite - -    -  -       485 
Survey  publications  on  phosphates  and  other  mineral  fertilizers 186 
Survey  work  on  water 
Index 489 
