﻿upon 
  the 
  surface 
  of 
  the 
  Earth. 
  493 
  

  

  Ind. 
  No. 
  (25) 
  a 
  gray 
  clay^ 
  per 
  Dr. 
  W. 
  A. 
  Noyes,* 
  Terra 
  Haute, 
  

   Ind. 
  No. 
  (26), 
  a 
  deep 
  orange 
  clay 
  sub-soil 
  per 
  Prof. 
  C. 
  E. 
  

   Wait, 
  Knoxville, 
  Teuu. 
  No. 
  (27), 
  a 
  pinkish 
  china 
  clay 
  from 
  a 
  

   10-foot 
  seam, 
  and 
  No. 
  (28), 
  a 
  coarse 
  gray 
  clay 
  from 
  an 
  18 
  foot 
  

   seam, 
  both 
  per 
  Mr. 
  W. 
  R. 
  Searcy, 
  Tuscaloosa, 
  Ala. 
  No. 
  (29), 
  

   a 
  heavy 
  gray 
  clay, 
  per 
  Mr. 
  A. 
  P. 
  Wright, 
  River 
  bottom 
  soil, 
  

   Bolivar 
  Co., 
  Miss. 
  No. 
  (30), 
  light 
  red 
  surface 
  loam 
  and 
  No. 
  

   (31), 
  a 
  gray 
  sub-soil, 
  both 
  per 
  Mr. 
  Tlios. 
  Dunnington, 
  Pine 
  

   Bluff, 
  Ark. 
  No. 
  (32), 
  a 
  brown 
  clay, 
  6 
  feet 
  deep, 
  per 
  Prof. 
  W. 
  

   H. 
  Echols, 
  Rolla, 
  Mo. 
  No. 
  (33), 
  a 
  pale 
  gray 
  loam, 
  per 
  Dr. 
  F. 
  

   W. 
  Traphagen, 
  Deer 
  Lodge, 
  Montana. 
  No. 
  (34), 
  a 
  gray 
  alka- 
  

   line 
  soil, 
  from 
  Truckee 
  Valley, 
  Nevada. 
  No. 
  (3,5), 
  a 
  yellow 
  

   surface 
  clay, 
  per 
  Dr. 
  Masser, 
  Los 
  Angeles, 
  Cal. 
  No. 
  (36), 
  a 
  

   brown 
  clay, 
  3 
  feet 
  deep, 
  per 
  Prof. 
  EL 
  E. 
  Storrs, 
  Los 
  Angeles, 
  

   Cal. 
  Nos. 
  (37) 
  to 
  (40) 
  were 
  sent 
  by 
  Prof. 
  E. 
  W. 
  Hilgard, 
  

   Berkeley, 
  Cal. 
  No. 
  (37), 
  upland 
  red 
  loam 
  Station 
  No. 
  1226, 
  from 
  

   Yuba 
  River 
  near 
  Smartsville. 
  No. 
  (38 
  ), 
  yellow 
  gray 
  Mesa 
  soil, 
  

   Station 
  No. 
  1281, 
  from 
  Chino 
  Ranch 
  Station, 
  San 
  Bernardino 
  

   Co. 
  No. 
  (39), 
  " 
  Red 
  Mountain 
  Land," 
  Station 
  No. 
  188, 
  from 
  

   a 
  vineyard 
  in 
  Sonora 
  Co. 
  No. 
  (40), 
  a 
  red 
  loam, 
  Station 
  No. 
  

   1110, 
  Thermolite 
  Colony, 
  Butte 
  Co. 
  

  

  The 
  percentage 
  of 
  titanic 
  oxide 
  found 
  in 
  these 
  respectively 
  

   is 
  as 
  follows 
  : 
  

  

  Air-dried. 
  

  

  Ignited. 
  

  

  A 
  

  

  ir-dried. 
  

  

  Ignited. 
  

  

  Air-dried. 
  

  

  Ignited. 
  

  

  (18) 
  0-83 
  

  

  0-88 
  

  

  (26) 
  

  

  0'46 
  

  

  0-50 
  

  

  (34) 
  0-57 
  

  

  

  (19) 
  0*88 
  

  

  0-98 
  

  

  (27) 
  

  

  1-01 
  

  

  1-12 
  

  

  (35) 
  0-72 
  

  

  0'82 
  

  

  (20) 
  1-17 
  

  

  1-26 
  

  

  (28) 
  

  

  0-67 
  

  

  0-76 
  

  

  (36) 
  0*49 
  

  

  0*53 
  

  

  (21) 
  0-55 
  

  

  0-58 
  

  

  (29) 
  

  

  0-46 
  

  

  0-61 
  

  

  (37) 
  0-77 
  

  

  0-85 
  

  

  (22) 
  0-49 
  

  

  0-55 
  

  

  (30) 
  

  

  0-52 
  

  

  0-62 
  

  

  (38) 
  0*72 
  

  

  0*75 
  

  

  (23) 
  0-57 
  

  

  0-61 
  

  

  (31) 
  

  

  0-60 
  

  

  0-62 
  

  

  (39) 
  4-93 
  

  

  6-05 
  

  

  (24) 
  0-71 
  

  

  0-76 
  

  

  (32) 
  

  

  0-57 
  

  

  0-65 
  

  

  (40) 
  0-90 
  

  

  0-97 
  

  

  (25) 
  0-58 
  

  

  0-62 
  

  

  (33) 
  

  

  0-44 
  

  

  0-50 
  

  

  Average 
  0-85 
  

  

  0-98 
  

  

  Nos. 
  (41) 
  to 
  (45) 
  are 
  from 
  Oceanica 
  and 
  Asia. 
  Nos. 
  (41) 
  to 
  

   (45) 
  were 
  sent 
  by 
  Prof. 
  A. 
  B. 
  Lyons, 
  Oahu 
  College, 
  Hawaii, 
  

   Sandwich 
  Islands. 
  No. 
  (41), 
  a 
  dark 
  brown 
  loam. 
  No. 
  (42), 
  

   a 
  yellow 
  brown 
  loam. 
  No. 
  (43), 
  a 
  yellow 
  brown 
  loam. 
  No. 
  

   (44), 
  a 
  brown 
  clay. 
  No. 
  (45), 
  a 
  gray 
  brown 
  loam. 
  No. 
  (46), 
  a 
  

   light 
  gray 
  china 
  clay 
  and 
  No. 
  (47), 
  a 
  gray 
  china 
  clay, 
  both 
  per 
  

   Miss 
  Mildred 
  Page, 
  Tokio, 
  Japan. 
  No. 
  (48), 
  a 
  piece 
  of 
  a 
  gray 
  

   brick 
  from 
  the 
  Great 
  Wall 
  of 
  China, 
  per 
  Rev. 
  Collins 
  Denny. 
  

   No. 
  (49), 
  a 
  pink 
  clay 
  and 
  No. 
  (50), 
  a 
  yellow 
  loam 
  subsoil 
  from 
  

   the 
  bank 
  of 
  the 
  Yellow 
  River, 
  and 
  No. 
  (51) 
  a 
  fine 
  yellow 
  silt 
  

   from 
  the 
  old 
  bank 
  of 
  the 
  Yellow 
  River. 
  The 
  three 
  last 
  speci- 
  

   mens 
  were 
  sent 
  by 
  Dr. 
  Edgar 
  Woods, 
  Tsing-Kiang-Pu, 
  China. 
  

   No. 
  (52), 
  light 
  red 
  pottery, 
  from 
  Kurrachee, 
  Sind, 
  India. 
  No. 
  

  

  * 
  Dr. 
  No-yes 
  writes 
  that 
  he 
  has 
  recently 
  found 
  from 
  -5 
  to 
  4* 
  per 
  cent 
  of 
  titanic 
  

   oxide 
  in 
  a 
  number 
  of 
  minerals 
  from 
  Arkansas. 
  

  

  