FOR    THE    YEAE8    L901-1905,    INCLUSIVE.  267 
Penrose  (R.  A.  F.,  jr.). 
1.  Present  condition  of  gold  mining  in  Arctic  America. 
Eng.  tfc  Mg.  Jour.,  vol.  76,  pp.  807-809,  852-853,  illus.,  1903. 
Peppel  (S.  V.). 
1.  Gypsum  deposits  in  Ohio. 
U.  S.  Geol.  Surv.,  Bull.  no.  223,  pp.  38-44,  3  pis.,  1904. 
Describes  character  and  distribution,  economic  development,  and  geologic  relations  of  gypsum 
deposits  occurring  in  Silurian  strata  of  Ohio. 
Peppel  (S.  V.).  Orton  (Edward,  jr.)  and. 
1.  The  lime  resources  of  Ohio  available  for  Portland-cement  manufacture. 
See  Orton  (Edward,  jr.)  and  Peppel  (S.  V.   .  1. 
Perkins  (-George  H. ). 
1.  Report  on  the  marble,  slate,  and  granite  industries  of  Vermont. 
Vt.  <  ieql.  Surv.,  Rept.  State  Geol.,  68  pp.,  23  figs.,  1898. 
Describes  occurrence  and  geologic  position  of  the  ma ibl(<.  slates,  and  granites  of  Vermont. 
2.  Report  of  State  geologist  on  the  mineral  resources  of  Vermont,  1899-1900. 
Burlington,  Vermont,  1900.     83  pp.,  29  figs. 
Describes  the  occurrence  of  copper,  slate,  and  building  and  ornamental  stones. 
3.  Sketch  of  the  life  of  Zadock  Thompson. 
Am.  Geol.,  vol.  29,  pp.  65-70,  por.,  1902;  Kept.  Vt.  stale  Geol.,  II!,  pp.  7-13.  por.,  1902. 
4.  Report  of  the  State  geologist  on  the  mineral   industries  and  geology  of  certain 
areas  of  Vermont. 
Vt.  Geol.  Surv.,  Rept.  Ill  (of  this  series),  191  pp.,  64  pis.,  1902. 
5.  List  of  reports  on  the  geology  of  Vermont,  1845-1900  [and]  List  of  publications  on 
the  geology  of  Vermont. 
Vt.  Geol.  Surv.,  Rept,  State  Geol.,  Ill,  pp.  1 1-21.  1902. 
6.  Report  on  mineral  industries  [Vermont]. 
Vt  Geol.  Surv.,  Rept,  State  Geol.,  Ill,  pp.  31-45,  3  pis.,  1902. 
Discusses  the  occurrence  of  minerals  and  building  and  ornamental  stones. 
7.  The  geology  of  Grand  Isle  [Vermont]. 
Vt,  Geol.  Surv.,  Rept,  State  Geol.,  Ill,  pp.  102-173,  43  pis.,  2  figs.,  1902. 
Describes  the  geographic  and  geologic  occurrence  and  history  of  the  formations  of  this  island. 
8.  Notes  on  the  wells,  springs,  and  general  water  resources  of  Vermont. 
U.  S.  Geol.  Surv.,  Water-Supply  and  Irrigation  Paper  no.  102.  pp.  73-93,  1904. 
9.  List  of  works  on  the  geology  of  Vermont, 
Vt.  Geol.  Surv.,  Rept.  State  Geol..  IV,  pp.  16-21,  1904. 
10.  Mineral  resources  of  Vermont. 
Vt,  Geol.  Surv.,  Rept,  State  Geol.,  IV.,  pp.  22-66,  33  pis.,  1904. 
Reviews  the  economic  resources  and  the  mining  and  quarrying  industries  of  Vermont. 
11.  Geology  of  Grand  Isle  County  [Vermont]. 
Vt.  Geol.  Surv.,  Rept,  State  Geol.,  IV,  pp.  103-143,  33  pis.,  1  fig.,  1904. 
Describes  the  topographic  and  physiographic  features  and  general  geology,  and  the  occur- 
rence, character,  and  relations  of  Ordovician  strata  and  Glacial  deposits. 
12.  On  the  lignite  or  brown  coal  of  Brandon  and  its  fossils. 
Vt.  Geol.  Surv.,  Rept,  State  Geol.,  IV,  pp.  153-162,  1  fig.,  1904. 
Gives  a  historical  sketch  of  the  investigations  upon  the  lignite  fossils. 
13.  Description  of  species  [of  fossil  fruits]  found  in  the  Tertiary  lignite  of  Brandon, 
Vermont. 
Vt.  Geol.  Surv.,  Rept.  State  Geol.,  IV,  pp.  174-212,  7  pis.,  1904. 
14.  Hydrology  of  Vermont.     A  summary  of  investigations  upon  the  drinking  waters 
of  Vermont. 
Vt.  Geol.  Surv.,  Rept.  State  Geol.,  IV,  pp.  213-227.  1904. 
