118 



PROCEEDINGS OF THE AMERICAN ACADEMY 



" Hence result the following osculating elements for April 6.5 : — 



" Metis. 

 1849. April 6.5, Mean Equinox 1849.0. M. B. T. 



"These elements give the following ephemeris for the reappearance 

 of Metis in 1849. The great diversity of the elements calculated from 

 normal places so little different would of itself indicate that great ex- 

 actness cannot be expected. And, were it not so, the unavoidable in- 

 security of the extrameridional observations at the discovery, and im- 

 mediately before the disappearance, of the planet, would warn us to 

 expect at least an uncertainty of one or two minutes in the predicted 

 place. 



" Metis. Mean Berlin Midnight. 



