of the Barometer near Edinburgh. 185 



21. Since this memoir was read, I have been favoured with a 

 confirmation, particularly interesting, of the identity of the law 

 which regulates the horary oscillation in the northern and the 

 southern hemisphere. Captain PHILIP P. KING, R. N. permits 

 me to make use of the results deduced from his admirable MS. 

 register kept for six months together, at Port Famine, in the 

 Straits of Magellan, South Lat. 53 38' ; West Long. 70 54'. 

 The following numbers give the difference of height in the ba- 

 rometer, reduced to 32 F. between 9 A. M. and 3 P. M. for each 

 month * : 



1828, February, .016 



March, .008 



April, . .026 



May, .026 



June, .006 



July, .042 



Mean Oscillation, .... .0207 

 Calculated by the Formula, . .0173 



Error, . . .0034 



The temperature was so low (not exceeding 43 F. for the 

 period from 9 A. M. to 3 P. M.) that M. BOUVARD'S formula would 

 err very greatly in defect. 



* The abstracts of Captain KING'S observations are about to be published in 

 the proceedings of the Royal Geographical Society, vol. I. 



