295 



results merely add to the number of observations from which the 

 mean is obtained. 



Prof. Bache remarked that his former result was thus confirmed. 



At Baltimore, the place of observation was in the second square, 

 N. E. of the Washington Monument. The same needles were used. 



Aug. 27, 1840. No. 1, 71° 31.7'. No. 2, 71° 39.1'. Mean of 

 Lloyd, No. 1 and No. 3, 71° 32.4'. Mean 71° 34.4', differing from 

 the results of both the former series. 



Prof. Bache stated, in continuation, that the geological formations 

 at and near Baltimore, rendered it difficult to select an unexception- 

 able site for magnetic observations there, and was a sufficient expla- 

 nation of the observed discrepancies. The results, which he had at 

 present obtained, differed about 10' from the mean of those of Profes- 

 sors Courtenay and Loomis. 



Dr. Patterson announced the death of Prof. Charles Bonny- 

 castle, a member of this Society (elected at the last meeting), 

 which took place on the 31st of October. 



Mr. Du Ponceau announced the death of Mr. Sylvanus Go- 

 don, a member of the Society, who died on the 17th of Octo- 

 ber. 



The Observatory Committee submitted a report, in part, on 

 the subject of the fund raised for the erection of an Obser- 

 vatory, and proposed the following resolutions, which were 

 adopted. 



Resolved, That if the City Councils shall grant to the Society the 

 privilege of erecting an Observatory in Rittenhouse Square, the So- 

 ciety will pledge $5000 of the Astronomical Fund for this object, 

 under such conditions as they shall hereafter prescribe. 



Resolved, That when it shall be ascertained that the proposed Ob- 

 servatory can be erected, the Observatory Committee be authorized 

 to solicit and receive subscriptions for such additions to the Astrono- 

 mical Fund, as may be rendered necessary by the undertaking. 



