i94 Scientific Intelligence, [Nov. 



MEDICO-BOTANIGAL SOCIETY OF LONDON. 



This Society held its first meeting this Session on Friday, 

 Oct 10. 



An address was delivered to the members on the objects and 

 utility of the Institution ; after which the death of its late Hono- 

 rary Member, Dr. Baillie, was notified to the Society, accompa- 

 nied by an appropriate eulogiam on his character. 



The meeting then adjourned to Oct. 31, 1823. 



Article XIV. 



SCIENTIFIC INTELLIGliNCE, AND NOTICES OF SUBJECTS 

 CONNECTED WITH SCIENCE. 



I. Return of the Expedition Jbr the Discover^/ of a North^tvest Passage. 



Our readers have doubtless been apprised, through the public 

 papers, of the safe return of the Expedition under Capt. Parry. 

 The primary object of the voyage, it appears, has not been attained ; 

 the only channel through which a passage to the westward was to be 

 expected, after it had been ascertained that the openings in Repulse 

 Bay and its neighbourhood were mere inlets to the American continent, 

 being blocked up by ice throughout the year. No particulars have as 

 yet transpired respecting the scientific results of the Expedition, which 

 we deem sufiiciently authentic for their transfer to the pages of the 

 Annals, 



II. Solar Light and Heat, 



Mr. Powell has been for some time engaged in experiments on solar 

 light and heat. He has examined the heating power of the prismatic 

 rays, but chiefly with respect to the effects said to be produced beyond 

 the red end of the spectrum. He has found that such effects are really 

 produced; but has accounted for their being observed in some cases, 

 and not in others, from certain differences in the coatings of the ther- 

 mometers employed. He has concluded from a number of experi- 

 ments with different coatings, that this heating effect is similar in its 

 relations to surfaces, to common radiant heat ; and differs essentially in 

 this respect from the heating power tvithin the spectrum. He has 

 made other experiments from which the nature and origin of this effect 

 may with great probability be inferred. The details will soon be made 

 public. 



III. On Cleavelandite, 



From the examination Mr. Levy has recently made of the felspars 

 contained in Mr. Turner's collection, it appears that half the speci- 

 mens which have hitherto been ranked under this name, belong to the 

 species which had been called albite, and has recently received the 

 name of clcavelandite from Mr. Brooke. It is rather curious that the 

 crystallographical difference between this last substance and felspar, 

 should have been detected upon specimens laminated, but not regularly 



