warman.]  DEGRADATION DELAWARE.  279 
Degradation;  sculpture,  subaerial  and  littoral,  contrasted Ann  2,  pp  183-186 
shore  terraces,  origin  of Ann  3,  pp  206-211 ;  Ann  5,  pp  75-89, 
112-116;  Mon  i,  pp  29-37;  Mon  xi,  pp  88-89 
subaerial  decay  of  rocks  and  origin  of  the  red  color  of  certain  formations.  .Bull  52 
terraces  due  to Ann  5,  pp  84-85,  115-120;  Mon  i,  pp  35-37,  78-81,  129 
time  ratios  indicated  by  post-Tertiary  pre-Glacial  erosion  on  Massachu- 
setts coast Ann  18,  n,  pp  588-591 
troughs  of  the  east  Appalachians Mon  xxxiii,  pp  11-36 
(See,  also,  Drainage  systems.) 
Degradation  and  deposition,  Glacial Ann  8,  i,  pp  355-369 
Degradation  and  drainage,  pre-Glacial,  in  Massachusetts Mon  xxix,  pp  510-513 
Degradation,  intrusion  and,  experiments  illustrating Ann  21,  in,  pp  291-303 
Degradation,  transportation,  and  deposition,  littoral Mon  i, 
pp  29-60;  Mon  xi,  pp  87-89 
Del  Norte  irrigation  canal,  Colorado Ann  13,  in,  pp  171-175 
Del  Rio,  Texas,  flow  of,  measurements  of Vim  18,  iv,  p  110;  Bull  140,  pp  85,  86 
Del  Rio  clay  of  Texas Ann  18,  n,  pp  236-237;  Ann  21,  vn,  pp 
283-286;  Bull  1(14,  p  17;  GF  42,  pp  2-3;  GF  64,  p  2 
Delaware,  altitudes  in Ann  18,  i,  pp  279-288; 
Bull  5,  p  76;  Bull  76;  Bull  160,  pp  112-113 
artesian- well  prospects  in    Bull  138,  p  124 
boundary  lines  of Bull  13,  pp  80-82;  Bull  171,  pp  86-88 
brick  industry  of MR  1887,  pp  535,  537 
building  stone  from,  statistics  of ME,  1882,  p451;  MR  1889-90,  pp  374,  386; 
MR  1891,  pp  457,  458;  MR  1892,  pp  706,  707;  MR  1893,  pp 
544,  545;  Ann  16,  iv,  p  437  et  seq;  Ann  17,  in  cont,  p  760  et 
seq;  Ann  18,  v  cont,  p  950  et  seq;  Ann  19,  vi  cont,  p  206  et 
seq;  Ann  20,  vi  cont,  p  271  et  seq;  Ann  21,  vi  cont,  p  335  et  seq 
clay  products  of,  statistics  of MR  1891,  pp  503-504; 
Ann  16,  iv,  pp  518,  519,  520,  521;  Ann  17,  in  cont,  p  819  et 
seq;  Ann  18,  v  cont,  p  1077  et  seq;  Ann  19,  vi  cont,  p  318  et 
seq;  Ann  20,  vi  cont,  p  466  et  seq;  Ann  21,  vi  cont,  pp  362,  363 
coke  in,  manufacture  of Ann  20,  vi  cont,  p  227 
Cretaceous  deposits  of Bull  82,  pp  87-88 
Eocene  deposits  in Bull  83,  pp  43,  86;  Bull  141 
gabbros  and  associated  rocks  in Bull  59 
gas,  illuminating  and  fuel,  and  by-products  in,  statistics  of Ann  20, 
vi  cont,  pp  227,  240,  243,  245,  247,  248,  249 
geographic  positions  in Bull  1 23,  p  72 
geologic  formations  in Bull  138,  pp  117-119 
geologic  maps  of.     (See  Map,  geologic,  of  Delaware. ) 
geologic  sections  in.     (See  Section, geologic,  in  Delaware.) 
geologic  and  paleontologic  investigations  in Ann  9,  p  122;  Ann  18,  i,  p  31 
granite  production  of,  statistics  of . . .  .MR  1889-90,  pp  374,  386;  MR  1891,  pp  457, 
458;  MR  1892,  pp  706,  707;  MR  1893,  pp  544,545;  Ann  16, 
iv,  pp  437,  442,  457,  458, 459;  Ann  17,  in  cont,  p  760  et  seq; 
Ann  18,  v  cont,  p  950  et  seq;  Ann  19,  vi  cont,  p  206  et  seq; 
Ann  20,  vi  cont,  p  271  et  seq;  Ann  21,  vi  cont,  p  335  et  seq 
iron,  iron  ore,  and  steel  from,  statistics  of Ann  2,  p  xxvni; 
MR  1882,  pp  120, 125, 133, 134, 135;  MR  1886,  p  18;  MR  1887, 
p  11;  MR  1888,  p  14;  MR  1889-90,  p  12;  MR  1891,  p  61; 
MR  1892,  pp  15, 17,  36;  MR  1893,  p  15;  Ann  16,  in,  pp  31, 194; 
Ann  17,  in,  pp  48,  63;  Ann  18,  vi,  pp  65,  72;  Ann  20,  vi,  p  82 
magnetic  declination  in Ann  17, 1,  pp  321-322 
