viii CONTENTS 
86. Table for determining apparent noon 
87. Place , 
Table of intensity at various ayeles 
Reflected and Absorbed Light 
88. The fate of incident light 
89. Methods of determination 
go. Leaf and epidermis prints 
Expression of Results 
gi. Light records : : 
g2. Light sums, means and curves 
Temperature 
93. . 
iThrernionietens 
94. Air thermometers 
g5. Soil thermometers 
96. Maximum-minimum thermometers 
97. Radiation thermometers 
98. Thermographs 
Readings 
gg. Time 
100. Place and height 
Expression of Results 
101. Temperature records 
102. Temperature sums and means 
103. Temperature curves 
104. Plant temperatures 
Precipitation 
105. General relations 
106. The rain gauge 
107. Precipitation records 
Wind 
108. Value of readings 
Iog. The anemometer 
110. Records 
Soil 
111. Soil as a factor é : : 
112. The value of soil surveys 
113. The origin of soils 
114. The structure of soils 
115. Mechanical analysis 
