Ohio, tornado and windstorm data
Oil disasters

Oklahoma

Optical phenomena

Orchard heating in California

Orchard spraying and weather in New York
Oregon

55
78-79
11, 55

50, 56, 78, 109

64
85-86
43, 141

Parmelee, J. B., long record as corn and wheat observer.

Paul, C. R., cooperative observer resigns

Periodogram, use of Schuster's, in analyzing rainfall periods

.133-134

134

22-23

Pressure, atmospheric, maps of, over China Sea

52

Decrease with height

98

And radio reception

26-27

Publications, notes on

19-20, 33-35, 51-52, 64, 113-114, 146-148

Punjab, rainfall period in, analyzed

22-23

Pyrheliometric readings

21

Radiation, in relation to cooling by convection..
Radio, reporting Arctic weather by

Broadcasting forecasts of river stages by

Transmitting weather maps by

Rain, indications of

Of mud

Rainfall (See under geographical divisions) and altitude)

19

155-157

62, 92-96

106

60

72

Sandstorms at Kamaran Island

Sequence of rainfall departures along course of ocean current 88-89, 162
Services, Meteorological (See also Observatories, and U. S.

Weather Bureau)

Shippers' forecasts

Shower of mud

Sierra Nevadas

Smithsonian Institution, and weather forecasting

Snow melting

Snow removal

Snow survey

49

60

77-78
22

106-109, 128

64, 127-128
77-78

Snowfall, in United States, winter of 1925-26

Societies, meteorological (See also American)

Storms, special maps for charting (See also Cyclones, Tornadoes,

wind)

41

146

111

22

21

100

70-71

32

60

33

92-96

32

131-132

50

61

36, 66-68

98

36, 66-68

78

14

65

54

36

71

41-42

112

44, 87-91, 162

111

55

58, 80

19-20

19-20

92

142

43-44, 158-159

143

34

58

101, 102

Mammato-cumulus in connection with
Potential gradient in

Tornadoes

Tropical cyclones

Tropics, the White Man and the

23-24

25-26

13, 24, 25, 36, 43-44, 55, 81-84, 163
51-52, 104-106, 119-122, 160-161, 162-163

Typhoon (See also Tropical cyclones).

United States (See also under geographical subdivisions)

57, 157-160

163

22-23, 38-41, 55, 130-131

United States Weather Bureau 19, 30-32, 51, 61, 70-71, 80, 112-113, 136
University of Michigan Greenland Expedition.

Uruguay

Variations in precipitation

164

46-48, 79, 138-139

22-23, 69

Ventilation

113-114, 158-159

Virginia

Visibility

Washington, George, weather notes in diary of.
Water levels in Great Lakes region.
Water power, at Muscle Shoals, Ala.
Weather (See also under special topics)
Bureau, U. S.
Maps

72, 129

78

50

69

27-28

19, 30-32, 51, 61, 70-71, 80, 112-113, 136
80, 145-146, 155-157

Notes on, in George Washington's diary
Observers wanted

Possible relation to ocean temperatures
Mid-month summaries for railroads

50
112-113
44, 88-89, 162

62

Why the Weather? by C. F. Brooks, notes from

40-41, 44, 55-56, 59, 61, 63-64, 78-79, 80, 102-103, 131-132, 133, 142,

72