vi ADVERTISEMENT. 



consulted at any time at the Institution. The second series, which is given in 

 the following pages, consisting of average temperatures, is sufficient to furnish all 

 necessary information for the study of our climate as far as it depends upon 

 temperature. 



All the materials were placed in charge of Mr. Charles A. Schott, Assistant 

 United States Coast Survey, to be reduced and discussed under his direction by 

 trained computers, at the expense of the income of the Smithson fund. He was 

 ably assisted by Mr. E. H. Courtenay, of the United States Coast Survey. 



The character of Mr. Schott for scientific knowledge, sagacity, and skill in the 

 line of investigation, and scrupulous accuracy as exhibited in the previous meteoro- 

 logical publications of the Institution, give assurance that the work here presented 

 to the public is a valuable contribution to the knowledge of the climate of the 

 United States. 



JOSEPH HENRY, 

 Secretary Smithsonian Institution. 

 Washington, D. C, 



January, 1876. 



