Intelligence and Miscellaneous Aiiicles. 391 



bility of producing two simultaneous sounds by the mouth ; in the 

 whistling of an air first as a solo, and then as a duet. The gentle- 

 man who has this power has such command of the mouth, that tlie 

 evidence of two coexisting sounds could not for a moment be doubted 

 by the hearers.^ 



April 10th. — Mr. Ainger completed his account of the development 

 of the Origin and early History of the Steam-engine. As before stated, 

 he differs much from M. Arago in his conclusions ; but as we have 

 reason to believe that his account, with the diagrams of proof attached 

 to it, will be published, we shall not do injustice to either party by 

 mutilating the evidence here. 



The meetings of the Royal Institution were then adjourned over 

 the 17th and 24th, to be resumed on May 1st. 



ROYAL SOCIETY OF EDINBURGH. 

 (Extract from a Letter from the Trustees of the late Alexander Keith, Esq.) 



" As the Royal Society of Edinburgh is the principal scientific esta- 

 blishment in Scotland, we hereby offer to its President and Council 

 the sum of 600^, the principal of which shall on no account be en- 

 croached on } while the interest shall form a biennial prize for the 

 most important discoveries in science made in any part of the world, 

 but communicated by their author to the Royal Society, and publish- 

 ed for the first time in their Transactions. With regard to the form 

 in which this prize is to be adjudged, we beg leave to suggest that it 

 maybe given in a gold medal not exceeding 15 guineas value, to- 

 gether with a sum of money, or a piece of plate bearing the devices 

 and inscriptions on the medal." 



The above-mentioned sum has been paid over to the Treasurer of 

 the Royal Society of Edinburgh ; ajul the prizes will be awarded at the 

 specified periods, if any discoveries of sufficient importance be pre- 

 sented during their currency. 



LVIII. Intelligence and Miscellaneous Articles. 



THE LATE EXPEDITION UNDER CAPTAIN FRANKLIN. 



THE Geographical Society of Paris have presented their annual Gold 

 Medal, of the value of one thousand francs, to Captain Franklin, 

 as a testimony of their sense of the importance of his second Expedition 

 to the shores of the Polar Sea. The letter announcing this honour is 

 so creditable to the taste and good feeling of the Geographical Society, 

 and so gratifying in a national |)oint of view, that, having earnestly 

 solicited permission to publish it, we have great satisfaction in placing 

 it before our readers. 



" Socii'tr de Cleographie. — Commission Centrale. 

 " Monsieur le Ca])itaine, " Paris, .'50 Mars 1829. 



" La Soci(^'te de (i^'Ogr'i|)hie de Paris, dunt le but est d'encourager les 

 ddcouvertes utiles, et de contribuer principalement aux progres des 

 sciences g<^ot;rai)iiiques, a fond^' un i)rix annuel en faveur du voyageur 



qui 



