CONTENTS 



CHAPTER I 



PAOBS 



The Weather 1-23 



How to use the Weather Map 2 



The storm -tracks, 2 — The weather map, 4 — The weather indi- 

 cations, 5. 



Weather Bureau Forecasts ,6 



Signals of the United States Weather Bureau, 7 — Canadian 

 signals, 8. 



Barometer and Wind Indications 9 



Popular Weather Signs ll 



Frosts, and Methods of Protection 12 



How frost forms, 12 — To find the dew-point, 14 — Table for 

 determining temperature of dew-point, 15 — Methods of protec- 

 tion against frost, 16. 



Phenology ^7 



Climate and Crop Production ; keeping Becords .... 19 

 Climatic records compiled by the weather services, 20 — How 

 climatic data may be secured, 21 — Making local observations, 23. 



CHAPTER II 



The Elements and the Soil 24-39 



Distribution of the Elements 25 



The atmosphere, 25 — The elements essential to the life and 



growth of plants, 25 — Ultimate composition of a wheat plant, 26 



— Ultimate composition of human body, 26. 

 The Ash and Mineral Parts of Animals and Plants .... 26 



Mineral elements in animal bodies. 27 — Composition of ash of 



human body, 27 — Composition of the ash of leading farm crops, 



28. 



Chemical Compounds 28 



The Soil 29 



Classification of soils in respect to origin, 29 — Classification of 



vii 



