194 METEOROLOGICAL ABSTRACT. 



thirty-fix divifions of the year. The mean of the three divi- 

 fions of every month is given in the next column, under the 

 title of the mean temperature of the % month. 



This arrangement of the meteorological abftract has been 

 adopted, as exhibiting the variations both of the barometer and 

 thermometer, and alfo their mean flate, without either entering 

 into particulars too minutely, or abftracting from them too. 

 much. 



It is prefumed that the mean temperatures, which are the 

 points moft difficult to be afcertained, are given with tolerable 

 exactnefs, as they are deduced from three obfervations made 

 every day, of which the firft, that at 8 A. M. is itfelf not far 

 from the medium temperature of the whole day, and the other 

 two are as near as circum (lances will allow, to the two extremes 

 of greatefl heat and greateft cold. 



The barometer of which the heights are here given, is the 

 fame that was ufed formerly, (See Tranfaclions of the Royal So- 

 ciety of Edinburgh, Vol. IV. p. 213.) ; but in May 1798 its place 

 was changed from Windmill Street to Buccleugh Place, about 

 130 yards farther to the fouth ; 3 feet lower than before, or 

 about 262 above the level of the fea. The thermometer is 

 {haded from the fun, expofed to the north, and about 30 feet 

 from the ground: At this height it often ftands at 33 or evea 

 34 degrees, when a flight froft is felt on the furface. 



METE0- 



