MARINE BAROMETER. 109 



pelago, the mercury rose to 30,23, previously to a fresh observations 

 breeze setting in from the eastward. In the evening of the ^^^ inferences 

 IStJi it blew strong from ESE, with hazy weather, and a jij^ correspon- 

 rapid fall of the mercury to 29,94 had then taken place; dent changes 

 but instead of the wind increasing, or bad weather coming ^^^'j^^^^^"^l^^ 

 on, the wind died away suddenly, and a light breeze came expected after 

 off the land at midnight, with cloudy weather. change in the 



At the Cape of Good Hope, which is nearly in the same jne^gr, 

 latitude, the mercury rises with the fresh gales that blow 

 there from the SE in the summer season. The weather that 

 accompanies these south-east winds, is nearly similar in both 

 places ; the atmosphere b -ing without clouds, but contain- 

 ing a whitish haz?, and tlie air usually so dry as sensibly to 

 att'ect the skill, particularly of the lips. 



3d, Jan. 22. Three degrees east of the Archipelago, the 

 mercury iell with some rapidity down to 29,65 with the 

 wind irom ESE. It was eight o'clock at night, and we 

 prepared for a gale from that quarter ; but at ten, the wind 

 suddenly shifted to WNW, coming very light off the land. 

 On its veering gradually round to SS W, clear of the land, at 

 noon, 23d, it freshened, and the weather became thick ; 

 yet the mercury had then risen to 29,84, and at eight in the 

 evening to 29,95, though the wind then blew strong. It 

 continued to rise to 30,16 as the wind shifted round to SE, 

 and fine weather came on; but on the wind passing round to 

 ENE and NNE, which was off the land, the mercury fell 

 back to 29,73, though the weather was fine and the wind 

 moderate. On a sudden shift of wind to the SW, a fresh 

 breeze with hazy weather, it again began to ascend, and a 

 similar routine of wind, producing nearly the same effects 

 upon the barometer, again took place. The effect of sea 

 winds in raising the mercury, in opposition to a strong breeze, 

 and of land winds in depressing it, though they were light, 

 was here exemplified In two remai-kablc instances, 



4tk. In the neighbourhood of the Isle of St. Francis of 

 Nuyts, longitude ISS^'' east of Greenwich, we experienced 

 a considerable change in the barometer. For nine days in 

 January and February the wind continued to blow con- 

 stantly, though moderately, from the eastward, mostly froiji 

 theSE. It appeared like a regular trade-wiiid or monsoon, 

 but so far partook of the nature of sea and land breezes, as 



commonly 



