TABLE OF CONTENTS.' 



ARTICLE I. Introduction. Pp. 16. 



Advertisement . . . . . . . iii 



List of Officers of the Smithsonian Institution . . . . ix 



ARTICLE II. Tables and Results of the Precipitation, in Rain and Snow, in the 

 United States; and at some Stations in Adjacent Parts of North 

 America, and in Central and South America. Collected by the Smith- 

 sonian Institution, and discussed under direction of Joseph Henry, Secre- 

 tary. Published March, 1872. 4to. pp. 178. Eight Diagrams, five Plates, 

 and three Charts. 

 Introduction ........ \ 



Collection and tabulation of records and results .... 3 



Special references to records ••■... 4 



Description of rain-gauges ....... 5 



Explanatory remarks on records ...... 8 



Tables of the aqueous precipitation in the United States . - . 11 to 119 



Explanation of Table A of average rain-fall for each month, season, and year 13 

 Explanation of Table B, of amount of rain-fall for a series of years . 87 



Tables A and B . . . . . . . 16 to 119 



Generalization of tabular results aud construction of rain-charts of the United 



States . . . . . . . . .120 



General character of the distribution of rain during the vear . 120 



Distribution of rain in summer ...... 122 



Distribution of rain (and snow) in winter . . . . .122 



Investigation of the annual Ductuation in the rain-fall . . . 124 



Permanency of the annual fluctuation ..... 136 



Causes of the annual fluctuation . . . . . .138 



Distribution of rainy days in the year ..... 139 



Investigation of the secular changes in the rain-fall .... 142 



List of meteorological stations ...... 161 



List of observers . . . . . . . .169 



ARTICLE III. Memoir on the Secular Variations of the Elements of the Orbits of 

 the Eight Principal Planets, Mercury, Venus, the Earth, Mars, 

 Jupiter, Saturn, Uranus, and Neptune ; with Tables of the same. 

 Together with the Obliquity of the Ecliptic, and the Precession of 

 the Equinoxes in both Longitude and Right Ascension. By John N. 

 Stockwell, M.A. Accepted for publication December, 1870. Published 

 June, 1S72. 4to. pp. 214. 



Each memoir is separately gaged aud indexed. 



