ST. HELENA 77 



panied by the corvette Favourita in order to convey to 

 France the remains of the late Napoleon Bonaparte. The 

 exhumation of the body from Tomb Vale took place on 

 October 15, and on the same day it was with military 

 honours placed on the frigate which remained at anchor 

 until Sunday the i8th, when she sailed for France. (Further 

 account under heading of Napoleon.) 



In this year a magnetic observatory was erected at Long- 

 wood, the windward side of the island, 1,760 feet above the 

 level of the sea, for the purpose of taking meteorological 

 observations. Those observations were continued for five 

 years by officers and non-commissioned officers of the Royal 

 Artillery specially selected for the purpose. The report 

 issued from the observatory says : 



The mean temperature derived from the five years of observation 

 is 61-4. A maximum is obtained about the middle of March, and 

 a minimum early in September. The progression from maximum 

 to minimum and from minimum to maximum is continuous. 



The mean is passed through, at nearly equal intervals, viz. early 

 in June and about the middle of December. The mean height of 

 the thermometer in the different months, ranged from 57*07 in 

 September to 66-24 m March, being a difference on the average of 

 only 9-17 between the hottest and coldest months. The extreme 

 range in the five years was : 



Highest 77-6, March 3rd, 1842 ; lowest, 52-0, September 5th, 1845. 

 By simultaneous hourly observations on 2nd May, 1841, at the 

 Observatory and at level of the sea with thermometer freely exposed 

 to the air, but protected as far as possible from disturbing influences, 

 the temperature was found to be 7-07 higher at the sea-side. Both 

 stations are on the windward side of the island. The observatory 

 was at an elevation of 1,765 feet and two and a half miles from the 

 sea on a nearly level and naked plain. The greatest temperature 

 at Longwood is less than Jamestown on the average of the year 

 by 9-125. 



The barometric pressure from the five years' observation has a 

 minimum in the beginning of March, and a maximum towards the 

 end of July, and between these periods the progression is continuous 

 and uninterrupted. 



The mean pressure in the five years was 28-285 inches ; lowest in 

 March, 28*232 ; July highest, 28-367. 



The greatest depression on March i4th, 1843, was 28-097, and the 

 greatest elevation 9th July, 1842, was 28-497. 



In 1842 Governor Middlemore was succeeded by Colonel 

 H. Trelawney and five companies, raised in England 



