CONTENTS 



CHAPTER I 



PAGES 



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 . '_. . 11 



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 . . ..... 17 



Climate and Crop Production ; keeping Records .... 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 



