42  PUBLICATIONS    OF    U.    S.    GEOLOGICAL    SURVEY.         [bull.  177. 
The  relative  abundance  of  the  chemical  elements,  by  F.  W.  Clarke,  pp.  34-42. 
On  the  occurrence  of  nitrogen  in  uraninite  and  on  the  composition  of  uraninite  in  general,  by 
W.  F.  Hillebrand,  pp.  43-79. 
Metacinnabarite  from  New  Almaden,  California,  by  W.  H.  Melville,  pp.  80-83. 
An  apparatus  for  the  determination  of  water  in  the  mineral  analyses,  by  Thomas  M.  Chatard, 
pp.  84-86. 
The  separation  of  titanium,  chromium,  aluminum,  iron,  barium,  and  phosphoric  acid  in  rock 
analyses,  by  Thomas  M.  Chatard,  pp.  87-90. 
Seven  new  meteorites,  by  L.  G.  Eakins,  pp.  91-97. 
On  a  petroleum  from  Cuba,  by  H.  N.  Stokes,  pp.  98-104. 
On  a  supposed  mineral  resin  from  Livingston,  Montana,  by  H.  N.  Stokes,  pp.  105-108. 
Preliminary  note  on  the  coefficients  of  thermal  expansion  of  certain  rocks,  by  William  Hal- 
lock,  pp.  109-118. 
Miscellaneous  analyses,  pp.  119-129. 
79.  A  late  volcanic  eruption  in  northern  California  and  its  peculiar  lava,  oy 
Joseph  Silas  Diller.     1891.     33  pp.,  17  pis.     Price,  10  cents. 
80.  Correlation  papers — Devonian  and  Carboniferous,  by  Henry  Shaler  Wil- 
liams.    1891.     279  pp.     Price,  20  cents. 
81.  Correlation  papers — Cambrain,  by  Charles  Doolittle  Walcott.  1891.  147 
pp.,  3  pis.  (maps).     Price,  25  cents.     (Out  of  stock.) 
82.  Correlation  papers — Cretaceous,  by  Charles  A.  White.  1891.  273  pp.,  3 
pis.  and  maps.     Price,  20  cents. 
83.  Correlation  papers — Eocene,  by  William  Bullock  Clark.  1891.  173  pp., 
2  pis.  (maps).     Price,  15  cents. 
84.  Correlation  papers — Neocene,  by  William  Healey  Dall  and  Gilbert  Dennison 
Harris.     1892.     349  pp.,  3  pis.  (maps).     Price,  25  cents. 
sf>.  Correlation  papers — The  Newark  System,  by  Israel  Cook  Russell.  1892. 
344  pp.,  13  pis.  and  maps.     Price,  25  cents. 
86.  Correlation  papers — Archean  and  Algonkian,  by  Charles  Richard  Van  Hise. 
1892.    549  pp.,  12  pis.  (maps) .     Price,  25  cents.      (Out  of  stock. ) 
87.  A  synopsis  of  American  fossil  Brachiopoda,  including  bibliography  and 
synonymy,  by  Charles  Schuchert.     1897.     464  pp.,  1  pi.     Price,  25  cents. 
88.  The  Cretaceous  Foraminifera  of  New  Jersey,  by  Rufus  Mather  Bagg,  jr. 
1898.     89  pp.,  6  pis.     Price,  10  cents. 
89.  Some  lava  flows  of  the  western  slope  of  the  Sierra  Nevada,  California,  by 
F.  Leslie  Ransome.     1898.     74  pp.,  11  pis.     Price,  15  cents. 
90.  A  report  of  work  done  in  the  division  of  chemistry  and  physics,  mainly 
during  the  fiscal  year  1890-91;  Frank  Wigglesworth  Clarke,  chief  chemist. 
1892.     77  pp.     Price,  10  cents. 
On  the  constitution  of  certain  micas,  vermiculites,  and  chlorites,  by  F.  W.  Clarke  and  E.  A. 
Schneider,  pp.  11-21. 
New  analyses  of  uraninite,  by  W.  F.  Hillebrand,  pp.  22-25. 
On  the  isomorphism  and  composition  of  thorium  and  uranous  sulphates,  by  W.  F.  Hillebrand 
and  W.  H.  Melville,  pp.  26-33. 
Powellite — calcium  molybdate;  a  new  mineral  species,  by  W.  H.  Melville,  pp.  34-37. 
Mineralogical  notes,  byW.  H.  Melville,  pp.  38-40. 
New  analyses  of  astrophyllite  and  tscheffkinite,  by  L.  G.  Eakins,  pp.  41-44. 
Two  new  meteorites,  by  L.  G.  Eakins,  pp.  45-46. 
On  the  action  of  phosphorous  oxychloride  on  the  ethers  and  chlorhydrines  of  silicic  acid,  by 
H.N.  Stokes,  pp.  47-55. 
On  the  colloidal  sulphides  of  gold,  by  E.A.Schneider,  pp. 56-61. 
Miscellaneous  analyses,  pp.  62-75. 
91.  Record  of  North  American  geology  for  1890,  by  Nelson  Horatio  Darton. 
1891.     88  pp.     Price,  10  cents. 
92.  The  compressibility  of  liquids,  by  Carl  Barus.  1892.  96  pp.,  29  pis. 
Price,  10  cents. 
93.  Some  insects  of  special  interest  from  Florissant,  Colorado,  and  other  points 
in  the  Tertiariesof  Colorado  and  Utah,  by  Samuel  Hubbard  Scudder.  1892.  35 
pp.,  3  pis.     Price,  5  cents. 
