233 



NOTE BY THE COMMITTEE. 



The observations at the Hudson Observatory are made by Prof. E. Loomis. 



„ ,, Washington Marine Obs'y. Lieut. S. M. Gilliss. 



„ „ Boston, R. T. Paine, Esq. 



„ „ Dorchester Obs'y- Wm. Cranch Bond 



„ „ Southwick Mass. Mr. A. Holcomb. 



„ „ Princeton, Prof. S. Alexander. 



,, ,, Dover, Ohio, Mr. J. Blickensderfer, jr. 



„ „ Brooklyn Obs'y. Mr. E. Blunt 



„ „ New Haven, Mr. E. P. Mason and Mr. Bradley. 



„ „ Philadelphia Obs'y. W is for Mr. S. C. Walker. 



„ „ „ K „ Prof. E.O.Kendall. 



„ „ „ R „ Wm. H. C. Riggs. 



„ „ „ . M „ Mr. E. P. Mason 



„ „ „ P „ R. T. Paine, Esq. 



The numbers which have an asterisk (*) prefixed to them are considered by 

 the observers as somewhat doubtful, from brightness of the moon's limb or 

 other causes. The European observations have been selected from those pub- 

 lished in Schumacher's Astronomische Nachrichten, on account of their coin- 

 cidence in date with the American observations. Ihe immersion and emer- 

 sion of rar Piscium, January 10th, 1839, took place both at the moon's dark limb. 

 At the immersion of » Pleiadum, July 6th, 1839, the star appeared to hang on 

 the moon's bright limb about 1.7s; or rather, the star appeared to have a sen- 

 sible disc taking that time to immerge. 



Professor Henry presented a communication, entitled " Con- 

 tributions to Electricity and Magnetism, Fourth Series. — On 

 Electro-dynamic Induction, Magnetic Distribution, &c, — by 

 Joseph Henry, Professor of Natural Philosophy, College of 

 New Jersey, Princeton;" and accompanied the presentation of 

 the same with sundry verbal and graphic illustrations. 



The communication was referred to a committee. 



Mr. Du Ponceau presented a communication, entitled "An 

 Historical Account of the Origin and Formation of the Ameri- 

 can Philosophical Society, held at Philadelphia, for promoting 

 Useful Knowledge;" when, in consequence of the lateness of 

 the hour and the amount of unfinished business, it was resolved, 

 that the Society do adjourn to meet again on Friday evening 

 next, and that due notice thereof be given in the public papers 

 by the Librarian. 



