Wind  action  on  Cape  Cod,  297.
Wind  action  on  Wyoming  soils,  296.
Wind-blown  sand  polish,  257.
Wisconsin,  rock-weathering  in,  278.
Wurtzilite  described,  126.
Zeolites,  as  conservators  of  potash,  374;
as  rock  constituents,  31 ;  at  Plombieres,
375 ;  composition  of,  32 ;  formed  in  deep-
sea  bottoms,  375;  in  soils,  374;  origin
of,  31 ;  products  of  hydro-metamor-
phism,  375.
Zeolitic  matter  in  soils,  370.
Zircon  syenite,  79.
Zonal  structure,  37.
Zonal  structure  incident  to  weathering,
258.
ELEMENTARY
PHYSICAL    GEOGRAPHY,

By  RALPH  S.  TARR,  B.S.,  F.G.S.A.,

Assistant  Professor  of  Dynamic  Geology  and  Physical  Geography  at

Cornell  University  :
Author  of  "Economic  Geology  of  the  United  States."

8vo.     Cloth.     488  pp.     Price  $1.40,  net.
Comments.
"  I  regard  Professor  Tarr's  book  as  one  of  the  first  publications  in  this
country  to  embody  the  new  principles  and  advanced  methods  in  the
study  of  physical  geography.  ...  It  seems  to  me  eminently  adapted
as  regards  its  style  and  the  nature  of  the  illustrations  for  the  grade  of
students  for  whom  it  is  intended ;  to  wit,  those  of  high  schools.  Most
of  the  book  is,  indeed,  written  in  a  style  so  simple  and  plain  that  par-
ticularly the  part  of  the  work  relating  to  physical  geography  might  well
find  a  place  in  the  upper  class  of  many  of  the  grammar  schools."  —  J.  B.
WOODWORTH,  Instructor  in  Geology,  Harvard  University,  Cambridge,
Mass.
"  I  have  recommended  the  study  of  Professor  Tarr's  admirable  book
to  be  required  of  students  entering  the  Engineering  Department  of  the
University  of  Michigan."  —  Professor  ISRAEL  C.  RUSSELL,  Department
of  Science,  University  of  Michigan,  Ann  Arbor,  Mich.
"  It  is  beyond  question  the  most  thoroughly  scientific  elementary
text-book  on  this  important  subject  which  has  yet  appeared."  —  Boston
Daily  Advertiser.
