180  BIBLIOGRAPHY    OF    NORTH    AMERICAN    GEOLOGY 
Hurley  (Thomas  Jefferson). 
1.  Famous  gold  nuggets  of  the  world. 
61  pp.,  illus.,  1900.     (Private  publication.) 
Hussakoff  (L. ). 
1.  Notes  on  the  Devonian  "  placoderm,"  Dimchthys  intermedius  New)). 
Am.  Mas.  Nat.  Hist,,  Bull.,  vol.  21,  pp.  27-36,  1  pi.  and  2  figs.,  1905. 
2.  On  the  structure  of  two  imperfectly  known  Dinichthyds. 
Am.  Mus.  Nat.  Hist.,  Bull.,  vol.  21,  pp.  109-411.  2  pis..  2  figs.,  1905. 
Hyatt  (Alpheus). 
1.  Pseudoceratites  of  the  Cretaceous.     Edited  by  T.  W.  Stanton. 
U.  S.  Geol.  Surv.,  Mon.  vol.  41,  351  pp.,  47  pis.,  1903. 
Discusses  briefly  structural  details  of  Jurassic  Ammonites,  and  gives  systematic  descriptions 
of  genera  and  species  of  Cretaceous  Pseudoceratites  from  North  America  and  other  parts  of 
the  world. 
Hyatt  (Alpheus)  and  Smith.  (James  Perrin). 
1.  The  Triassic  cephalopod  genera  of  America. 
U.  S.  Geol.  Surv.,  Professional  Paper  no.  40,  394  pp.,  85  pp.,  1  fig.,  1905. 
The  systematic  descriptions  of  orders,  families,  genera,  and  species  are.preceded  by  a  synopsis 
of  American  Triassic  stratigraphy,  a  discussion  of  the  classification  of  Triassic  ammonites 
and  a  table  showing  the  occurrence  of  American  Triassic  cephalopod  genera. 
Hyde  (Jesse  E.). 
1.  Changes  in  the  drainage  near  Lancaster  [Ohio]. 
Ohio  Naturalist,  vol.  4,  pp.  119-157,  4  figs.,  1901.    - 
Discusses  changes  in  drainage  produced  by  the  ice  invasions  of  the  Glacial  period. 
I. 
Idding-s  (Joseph  Paxson). 
1.  Chemical  composition  of  igneous  rocks,  expressed  by  means  of  diagrams,  with 
reference  to  rock  classification  on  a  quantitative  chemico-mineralogica]  basis. 
U.S.  Geol.  Surv.,  Professional  Paper  no.  is,  '.is  pp.,  s  pis.  (diagrams),  1903. 
Reviews  the  use  of  diagrams  in  representing  the  composition  of  igneous  rocks,  discusses  the 
purpose  ami  construction  of  the  diagrams  employed  by  the  writer,  gives  a  classified  list  (f 
analyses  used  in  constructing  the  diagrams,  and  a  general  discussion  of  igneous  rocks  as  to 
occurrence,  composition,  correlation,  ami  classification. 
2.  A  fracture  valley  system. 
Jour.  Geol.,  vol.  12,  pp.  91-105,  1  pi.,  1904. 
Discusses  the  relations  subsisting  between  systems  of  drainage  and  fractures,  and  describes, 
in  illustration,  the  drainage  system  and  geologic  structure  of  (he   Livingston  quadrangle, 
folio  1  of  the  Geologic  Atlas  of  the  United  States. 
3.  Quartz-feldspar-porphyry  (graniphyro  liparose-alask<;s<>  |  from  Llano,  Texas. 
Jour.  Geol.,  vol.  12.  pp.  225-231.  1  !04. 
Describes  petrographic  characters  and  chemical  composition,  and  discusses  its  position  in  the 
quantitative  system  of  classification. 
4.  The  isomorphism  and  thermal  properties  of  the  feldspars.     Part  II.  Optical  study. 
Lime-soda  feldspars  crystallized  in  open  crucibles  from  fused  constituents. 
Carnegie  Inst,  of  Wash.,  Publ.  no.  31,  pp.  77-95,  26  pis.,  1  fig.,  1905. 
Iddings   (Joseph  P.),  Cross  (Whitman),   Pirsson    (Louis   V. ),  and  Washing-ton 
(HenryS.). 
1.  A  quantitative  chemico-mineralogical  classification  and  nomenclature  of  igneous 
rocks. 
See  Cross  (Whitman)  and  others,!. 
2.  Quantitative   classification  of  igneous  rocks. 
See  Cross  (Whitman)  and  others, 2. 
