CONTEI^TS, 



at Marietta, Ohio ; at San Francisco, 



Preface to First Edition 

 Preface to Second Edition 

 Collection and tabulation of records and results 

 Special references to records 



Description of rain-gauges, and directions for obseiviug 

 Explanatory remarks on records 

 Tables of aqueous precipitation in the United States, (Tables A and B) . . . 1 



Explanation of Table A of average rain-fall for each month, season, and year 

 Explanation of Table B, of amount of rain-fall for a series of years 

 Generalization of tabular results and construction of rain-charts of the United States 

 General character of the distribution of the rain during the year 

 Distribution of rain in summer . 

 Distribution of rain (and snow) in winter 

 Distribution of rain in spring 

 Distribution of rain iu autumn 

 Investigation of the annual fluctuation iu the rain-fall 

 Permanency of the annual fluctuation 

 Causes of the annual fluctuation 

 Distribution of rainy days in the year 

 Investigation of the secular changes in the rain-fall . 

 List of Illustrations : 



Diagram 1. Characteristic annual fluctuation of rain fal 



California ; and at Boston, Massachusetts 

 Diagram 2. Eight type-curves of the annual fluctuation in rain-fall 

 Diagram 3. Geographical distribution of the first or Atlantic coast type of annual rain-fall 

 and position of observing stations ...... 



Diagram 4. Monthly percentage of the annual rain-fall, at different epochs, at Charleston 

 South Carolina ....;... 



Diagram 5. Fluctuations in the annual rain-fall, Atlantic sea-coast, Maine to Maryland 

 Diagram 6. Fluctuations in the annual rain-fall. State of New York and adjacent localities 

 Diagram 7. Fluctuations of the annual rain-fall, valley of the Ohio river, from Ohio to 

 eastern Missouri ....... 



Diagram 8. Graphical representation of successive means of the annual rain-fall 

 Plates I to V. Annual fluctuation in the rain-fall at stations of long series of observations, 

 and showing the same characteristics in their annual distribution in the rain ; re- 

 ferred to on pages 196, 197. 

 Charts, five in number, showing the geographical distribution of rain (and melted snow) in the 

 United States for the whole year, and the spring, summer, autumn, and winter 

 seasons, respectively ; referred to on pages 187-193. 



List of Meteorological Stations ........ 



List of Observers ........... 



Index ............ 



(Ill) 



PAGE. 

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 XV 



to 185 



XIX 



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