INDEX 
119 
Page. 
Sodium, method of determining. 32 
ratio of, to potassium in different types of 
water.92,93 
See also Alkalies. 
Sodium sulphate, reduction of, experiments 
on. 97 
Sodium sulphide, occurrence of. 46 
Stabler, Herman, acknowledgment to. 6-7 
Standard Oil Co., water analyses from. 40 
Starke, E. A., acknowledgment to.... 7 
Structure, relation of, to distribution of salt 
water.23-25 
Sulphate, content of, in ocean water. 44 
distribution and significance of. 6,43-44,113-114 
gradation of, in depth. 109-110 
reduction of.93-98 
source of.11-12 
substitution of carbonate for. 88-89 
Sulphate-free waters, occurrence of.93-94 
Sulphide, distribution and significance of_45-46 
oxidation of. 98 
Sulphur, action of, on oil.102-105 
formation of, from hydrogen sul¬ 
phide. 95,98,99,100-101 
Sulphur waters, position of. 46 
Surface waters, analyses of. 55-57,85 
Synclines, salt water in.23-24 
T. Page. 
Temperature, range of. 19 
use of, in prospecting. 19-20 
Tertiary formations, nature and distribution 
of.,. 10 
“Top water,” use of term. 17 
Tough, F. B., acknowledgment to. 7 
Types of ground water, areal relations of_86-93 
vertical relations of. 78-85 
V. 
Van der Linden, B. R., acknowledgment to. 7 
Volatile matter, omission of, from analyses-. - 47-48 
W. 
Wallace, W. M., acknowledgment to. 7 
Water, connate, kinds of. 21 
connate, use of term.21-23 
determination of source of. 6,8 
difficulty with, in oil wells. 5 
ground, circulation of. 11-12 
pressure of 1,000-foot column of. 15 
salt, association of, with petroleum.25-26 
distribution of, governed by structure 23-25 
Wells, water, causes of pressure in. 18 
Westside Coalinga field, constancy of condi- 
tionsin. 7 
ground waters in. 27 
position of. 26 
4 
O 
1 
