38  PUBLICATIONS    OF    U.    S.    GEOLOGICAL    SURVEY.         [bull.  177. 
12.  A  crystallographic  study  of  the  thinolite  of  Lake  Lahontan,  by  Edward  S. 
Dana.     1884.     34  pp.,  3  pis.     Price,  5  cents. 
13.  Boundaries  of  the  United  States  and  of  the  several  States  and  Territories, 
with  a  historical  sketch  of  the  territorial  changes,  by  Henry  Gannett,  chief 
geographer.     1885.     135  pp.     Price,  10  cents.      (Out  of  stock.) 
14.  The  electrical  and  magnetic  properties  of  the  iron-carburets,  by  Carl  Barus 
and  Vincent  Strouhal.     1885.     238  pp.     Price,  15  cents. 
15.  On  the  Mesozoic  and  Cenozoic  paleontology  of  California,  by  Charles  A. 
White,  M.  D.     1885.     33  pp.     Price,  5  cents. 
16.  On  the  higher  Devonian  faunas  of  Ontario  County,  New  York,  by  John  M. 
Clarke.     1885.     86  pp.,  3  pis.     Price,  5  cents. 
17.  On  the  development  of  crystallization  in  the  igneous  rocks  of  Washoe, 
Nevada,  with  notes  on  the  geology  of  the  district,  by  Arnold  Hague  and  Joseph 
P.  Iddings.     1885.     44  pp.     Price,  5  cents. 
18.  On  marine  Eocene,  fresh-water  Miocene,  and  other  fossil  Mollusca  of  west- 
ern North  America,  by  Charles  A.  White,  M.  D.  1885.  26  pp.,  3  pis.  Price,  5 
cents. 
19.  Notes  on  the  stratigraphy  of  California,  by  George  F.  Becker.  1885.  28 
pp.     Price,  5  cents.     (Out  of  stock.) 
20.  Contributions  to  the  mineralogy  of  the  Rocky  Mountains,  by  Whitman 
Cross  and  W.  F.  Hillebrand.     1885.     114  pp.,  1  pi.     Price,  10  cents. 
21.  The  lignites  of  the  Great  Sioux  Reservation;  a  report  on  the  region  be- 
tween the  Grand  and  Moreau  rivers,  Dakota,  by  Bailey  Willis.  1885.  16  pp., 
5  pis.  and  maps.     Price,  5  cents. 
22.  ( )n  new  Cretaceous  fossils  from  California,  by  Charles  A.  White,  M.  D. 
L885.     25  pp.,  5  pis.     Price,  5  cents. 
2.'!.  ( )bservations  on  the  junction  between  the  eastern  sandstone  and  the  Ke- 
weenaw  scries  on  Keweenaw  Point,  Lake  Superior,  by  R.  D.  Irving  and  T.  C. 
Chamberlin.     1885.     124  pp.,  17  pis.  and  maps.     Price,  15  cents. 
24.  List  of  marine  Mollusca,  comprising  the  Quaternary  fossils  and  recent 
forms  from  American  localities  between  Cape  Hatteras  and  Cape  Roque,  includ- 
ing the  Bermudas,  by  William  Healey  Dall.     1885.     336  pp.     Price,  25  cents. 
25.  The  present  technical  condition  of  the  steel  industry  of  the  United  States, 
by  Phineas  Barnes.     1885.     85  pp.     Price,  10  cents. 
26.  Copper  smelting,  by  Henry  M.  Howe.  1885.  107  pp.  Price,  10  cents. 
(Out  o!'  stock.) 
27.  Report  of  work  done  in  the  division  of  chemistry  and  physics,  mainly  dur- 
ing the  fiscal  year  1884-85.     1886.     80  pp.     Price,  10  cents. 
Topaz,  from  Stoneham.  Maine,  by  F.  W.  Clarke,  pp.  9-15. 
On  the  separation  of  titanium  and  aluminum,  with  a  note  on  the  separation  of  titanium  and 
iron,  by  F.  A.  Gooch,  pp.  16-2(5. 
A  method  of  filtration  by  means  of  easily  soluble  and  easily  volatile  filters,  by  F.  A.  Gooch, 
pp.  27-29. 
The  relation  between  electrical  resistance  and  density,  when  varying  with  the  temper  of  steel, 
by  C.  Barus  and  V.  Strouhal,  pp.  30-50. 
The  relation  between  time  of  exposure,  temper-value,  and  color  in  oxide  films  on  steel,  by  C. 
Barus  and  V.  Strouhal,  pp.  51-61. 
Miscellaneous  analyses,  pp.  62-76. 
28.  The  gabbros  and  associated  hornblende  rocks  occurring  in  the  neighbor- 
hood of  Baltimore,  Md.,  by  George  Huntington  Williams,  associate  professor  in 
the  Johns  Hopkins  University.     1886.     78  pp.,  4  pis.     Price,  10  cents. 
29.  On  the  fresh-water  invertebrates  of  the  North  American  Jurassic,  by 
Charles  A.  White,  M.  D.     1886.     41  pp.,  4  pis.     Price,  5  cents. 
30.  Second  contribution  to  the  studies  on  the  Cambrian  faunas  of  North  Amer- 
ica, by  Charles  Doolittle  Walcott,     1886.     369  pp.,  33  pis.     Price,  25  cents. 
