FOE    THE    YEARS    1901-1905,   INCLUSIVE.  147 
Grimsley  (G.  P.) — Continued, 
7.  The  gypsum  of  Michigan  and  the  plaster  industry. 
Mich.  Geol.  Surv.,  vol.  9,  pt.  2,  246  pp.,  29  pis.,  49  figs.,  1904. 
Gives  an  account  of  the  occurrence  and  utilization  of  gypsum  deposits  in  other  countries  and 
States,  describes  the  geology  and  topography  of  the  Michigan  series  gypsum,  and  the  min- 
ing of  the  gypsum  deposits  and  manufacture  into  plaster,  and  discusses  the  origin  of  gyp- 
sum and  its  various  uses. 
8.  Origin  of  gypsum,  with  special  reference  to  the  origin  of  the  Michigan  deposits. 
Kans.  Acad.  Sci.,  Trans.,  vol.  19,  pp.  110-117,  1  pi.,  1905. 
Griswold  (W.  T. ) . 
1.  The  Berea  Grit  oil  sand  in  the  Cadiz  quadrangle,  Ohio. 
U.  S.  Geol.  Surv.,  Bull.  no.  198,  43  pp.,  1  pi.,  1  fig.,  1902. 
Describes  the  occurrence  of  petroleum  and  the  method  used  in  constructing  a  contour  map 
of  the  Berea  grit  oil  sand  in  this  area. 
2.  Structural  work  during  1901  and  1902  in  the  eastern  Ohio  "oil  fields. 
U.  S.  Geol.  Surv.,  Bull.  no.  213,  pp.  336-344,  1903. 
Describes  factors  controlling  accumulation  of  oil,  the  method  used  in  constructing  a  map  of 
the  oil  sand,  the  structure  of  the  Berea  grit,  and  the  development  of  the  field. 
3.  Pittsburg  coal  in  the  Burgettstown  quadrangle,  Pennsylvar:a. 
U.  S.  Geol.  Surv.,  Bull.  no.  260,  pp.  402-410,  1  pi.,  1905. 
Describes  the  methods  of  work,  the  general  geology,  and  the  occurrence  and  mining  of  the 
Pittsburg  coal  in  this  quadrangle. 
Guild  (F.  N.). 
1.  Petrography  of  the  Tucson  Mountains,  Pima  Co.,  Arizona. 
Am.  Jour.  Sci.,  4th  ser.,  vol.  20,  pp.  313-318,  1  pi.,  1905. 
2.  El  Instituto  Geologica  de  Mexico. 
Am.  Geol.,  vol.  36,  pp.  293-296,  1  pi.,  1905. 
A  brief  account  of  the  Geological  Survey  of  Mexico,  giving  history,  organization,  etc.,  and  a 
list  of  its  publications. 
Gulick  (Addison). 
1.  The  fossil  land  shells  of  Bermuda. 
Phila.  Acad.  Nat.  Sci.,  Proa.  vol.  56,  pp.  406-421,  1  pi.  and  3  figs,  (maps),  1904. 
Describes  the  occurrence  and  gives  systematic  descriptions  of  fossil  land  shells  of  Bermuda. 
Gulliver  (F.  P.). 
1.  Joint  meetings  of  the  Geological  Society  of  America,  Section  E,  and  the  National 
Geographic  Society. 
Science,  new  ser.,  vol.  16,  pp.  258-268,  1902. 
Gives  titles  and  abstracts  of  papers  read  at  the  meeting  at  Pittsburg,  Pa.,  July  1  to  3,  1902. 
2.  Cuttyhunk  Island. 
Abstract:  Geol   Soc.  Am.,  Bull.,  vol.  13,  p.  538,  1903. 
3.  Nantucket  shorelines.     I. 
Abstract:  Geol.  Soc.  Am.,  Bull.,  vol.  14,  pp.  555-556,  1904. 
Outlines  a  proposed  investigation  to  determine  changes  in  shore  lines. 
4.  Nantucket  shorelines.     II. 
Geol.  Soc.  Am.,  Bin1  .  vol.  15,  pp.  507-522,  4  pis.,  4  figs.,  1904. 
Describes  recent  changes  in  the  shore  lines  of  Nantucket  Island. 
5.  Island  tying. 
Intern.  Geog.  Cong.,  Eighth,  Rept.,  pp.  146-149,  1  fig.,  1905. 
Describes  the  method  by  which  islands  are  connected  with  one  another  and  the  mainland  by 
the  deposition  of  sediment. 
6.  Sudbury  basin  shore  lines  [Massachusetts]. 
Abstract:  Science,  new  ser.,  vol.  22,  pp.  334-335,  1905, 
