REPORT OF THE SECRETAEY. 25 



one years; Prof. Z. Thompson, at Burlington, "Vermont, for twen- 

 ty-six years; Samuel Rodman, of New Bedford, Massachusetts, for 

 thirty-six years. 



Of the series, those of Caswell and Smith have been published in full, 

 and those of Oleaveland and Hildreth are now in the hands of the prin- 

 ter, and will form a part of the sixteenth volume of the Contribu- 

 tions to Knowledge. 



The " Monthly Bulletin of the Agricultural Department" still con- 

 tinues to contain a large amount of meteorological information derived 

 from the reports of the Smithsonian observers. In preparing the 

 materials for this a part of the time of Mr. Force, the assistant in 

 charge of meteorology, has been occupied every month. This publica- 

 tion still continues to be of value to the farmer, and of interest to 

 our observers, since it gives them a ready means of comparing their 

 observations with those made in other parts of the country. 



The anemometer, which for many years recorded the direction and 

 intensity of the wind on the top of the high tower of the Institution, 

 was destroyed with other instruments in the fire. As soon as there- 

 construction of this tower is completed, one of Osier's anemometers 

 will be erected in the same place. The use of one of these instru- 

 ments, belonging to the National Observatory, has been kindly granted 

 to us by the Secretary of the Navy. A standard barometer, by New- 

 man, belonging to the Institution, now in the possession of Professor 

 Guyot, will also be placed, with other instruments, in the same tower, 

 and the full series of observations resumed. 



The break in our series, however, is not of so much importance as 

 at first sight it might appear, since a similar series has been kept up 

 continually at the Observatory, which is a mile west of the Institution. 



Exchanges. — The extensive system of international, scientific and 

 literary exchanges, so long carried on by the Institution, has been 

 fully maintained during the year. Eighty-three boxes, containing 

 1,170 packages, were sent to our foreign agents in 1866, and over 

 8,000 parcels received from them. These packages, as in former 

 years, contain the publications of the Institution, public documents, 

 transactions of societies and scientific works by individuals, besides 

 specimens of natural history. 



Acknowledgments are again due to the various steamship, railroad 

 and express companies mentioned in the last report who have for a 

 number of years contributed materially to the advance of science by 

 the free freights and important privileges granted by them to the 

 Institution in carrying on its system of exchange. 



