322  LNDEX    TO    PUBLICATIONS    OF    U.    8.    GEOL.    8UKVJKY.     [bull.itt. 
Feldspar,  thin  section  of,  from  Pennsylvania,  South  Mountain  (from  quartz- 
porphyry    Bull  136,  pp  91      7      -  '-P-1 
thin  section  of.  from  Yellowstone  Park  (microliter?  of)  .Mon  xxxn.  n.  pp  422-^23 
Feldspar-porphyry,  analysis  of.  from  Montana.  Castle  Mountain  district Be. 
pp  135,  136;  Bull  148,  p  151:  Bull  16S,  p  130 
Feldspar  rocks,  igneous,  a  classification  of Ann  21  ►,  vn.  pp  186 
Feldspathic  magma  of  Nevada,  Eureka  district Mon  xx. 
Feldspathic  rocks,  thermal  effect  of  action  of  aqueous  vapor  on Ann  2, 
pp  325-330;  Mon  in.  pp  2  " 
Felsite,  analysis  of.  from  Pennsylvania,  South  Mountain  (laminated-  ..Bull  136.  p  34 
analysis  of,  from  Virginia,  near  Monterey  (porphyritic) Bull  168,  p  51 
of  Keweenaw  series Ann  3,  pp  113-114;  Mon  v,  pp  95-112 
of  Xarragansett  Basin Mon  xxxin,  pp  116,  153-155 
of  Northwestern  States Ann  5,  p  214 
thin  section  of,  from  Minnesota,  sec.  28,  T.  56  N.,  E.  7  W Mon  v.  pp  100-101 
Felsite-porphyry  of  Montana,  microscopic  petrography  of Bull  139,  pp  I1 
Felsophyre,  analysis  of.  from  Virginia,  near  Monterey Bull  168,  p  51 
sonite,  analysis  of.  from  North  Carolina,  Burke  County Bull  74.  p  75 
Fernandan  system  of  r< >cks  i  if  Texa.- Bull  86,  pp  267-269,  474.  504 
Fernow  rhyolite  of  Utah.  Tintic  district GF  I 
Devonian Bull  120.  pp  40-50 
of  Cretacous  of  Black  Hills Ann  10.  n.  pp  651-664 
of  Mesozoic  of  California Ann  20,  n,  pp  343-353 
of  Mesozoic,  older,  of  North  Carolina Ann  20.  n,  pp  288-289 
of  Triassic  <  >f  Pennsylvania Ann  20,  n,  pp  235-241 
3i  i  .  also,  Fill    - 
Ferration  in  Colorado,  Aspen  district Mon  xxxi,  pp  221-223 
Terrell's  law  of  stream  erosion Mon  xxix.  p  734 
Ferric  >ulphates,  basic,  analyses  of Mon  xn,  ] i  551  I 
Ferrodolomite,  analysis  of.  from  Michigan,  Marquette  district Bull  148, 
P  268;  Bull  168,  | 
Ferromagnesian  minerals  in  rocks,  decomposition  of Mon  in. 
Ferromanganese,  analysis  of Ann  18,  v,  p  297;  MR  1883-84,  p  564 
•  and  spiegeleisen,  production  of,  1872-1899 Ann  21,  vi,  p  93 
Fertilizer  trade  of  North  Carolina  in  1886 MP  1886,  pp  611-617 
Fertilizers,  analyses  of,  from  various  localities MR  1883-84, 
pp  816-819,821;  MR  L885,  pp  471-473:  MR  1887, pp59 
of  Porto  Rico,  occurrence  of Ann  20,  vi  cont,  pp  774  775 
statistics  of MR  1882,  pp  504r-531;  MP  1883-84, pp  783-826;  MR  1885, 
pp  445-473;  MR  1886,  pp  606-627;  MR  1887,  pp  580-594; 
MR  1888,  pp  586-696;  MR  1889-90,  pp  449-455;  MR  1891, 
pp  557-563;  Ml:  1892,  pp  782-784;  MR  1893,  pp  703-712; 
Ann  16  iv,  pp  600-035;  Ann  17,  jii  cont,  pp  951-957; 
Ann  is.  v  cont,pp  1233-1242;  Ann  19,  vi  cont,  pp  535-556; 
Ann  20,  vi  rout,  pp  619-639;  Ann  21,  vi  cont,  pp  4^1-502 
value  of,  commercial WS  22,  pp  35-36 
Ferruginous  gravel  of  Florida Bull  84,  pp  109,i 325 
Fibrolite,  analysis  of,  from  France.  Brittany Bull  60,  p  127 
Fibroliteand  fibrolite-schist  inclusions  in  Massachusetts..  .Mon  xxix,  pp229,  240-24S 
Field  work,  geologic,  in  complexly  folded  districts,  practical  methods  of Vim  16, 
i.  pp  739-742 
Filicales  from  (oal  Measures  of  Lower  Missouri Mon  xxxvii,  pp  10-144 
from  (  retaceous  of  Black  Hills Ann  10,  n.  pp  051-004,  704 
