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Art. IX. — Details of a Barometrical Measurement of 

 the Sugar-loaf Mountain at Sierra Leone, a?id of other 

 Heights situated within the Tropics. In a Letter from 

 Captain Eowakd Sabine, of the Royal Artillery, to 

 J. F. Daniell, Esq. 



MY DEAR SIR, 



I have much pleasure in communicating to you the accom- 

 panying detail of a barometrical measurement of the height of 

 the Sugar-loaf Mountain at Sierra Leone, because I am enabled 

 to add in comparison, the result of a geometrical determination 

 of the same, which has been accomplished since I quitted 

 Africa. 



The Sugar-loaf, so called from its shape, is the highest point 

 of the mountain district of the colony, included as yet within 

 the limit to which cultivation has extended. This district, as 

 you are aware, is the site of the twelve most interesting settle- 

 ments of liberated Africans, from the principal of which. Re- 

 gent-town, it is distant about three miles, being altogether 

 about eight or nine from Free-town, the seat of government : 

 a road has been opened by the inhabitants of Regent-town, by 

 which the summit is accessible, and has been sufficiently cleared 

 of its forest-trees to admit the view around. In the continua- 

 tion of the Sierra towards the south, at about 20 miles distance, 

 the land appears to attain a greater general elevation than in 

 the neighbourhood of the Sugar-loaf, and there are several 

 points, especially, which are probably much higher ; to these 

 there is as yet no road, but from the very rapid advance which 

 the colony is making in population and in settlement, it cannot 

 be doubted that these points must very shortly be necessarily 

 included in the Colonial Survey. 



Dr. Nicol, deputy-inspector of army hospitals, was kind 

 enough to allow me the use of a stationary barometer, in ex- 

 cellent order, made by Gary, and the property, I believe, of the 

 College of Physicians ; it is the same instrument which has 

 since accompanied Captain Laing in his very interesting eif- 

 fcursion to the Soolima country, in which the NiG;or takes its 

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