194 METEOROLOGICAL ABStRACT. 



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

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

 title of the mean temperature of the.month. 



This arrangement of the meteorological abftraift has been 

 adopted, as exhibiting the variations both of the barometer and 

 thermometer, and alfo their mean ftate, without either entering 

 into particulars too minutely, or abllrading from them too 

 much. 



It is prefumed that the mean temperatures, which are the 

 points moft difficult to be afcertained, are given with tolerable 

 exadnefs, 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 circumftances will allow, to the two extremes 

 of greatell heat and grcatefl: cold. 



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

 fame that was ufed formerly, (See TranJ'it6lions of the Royal So- 

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

 was changed from Windmill Street to Buccleugh Place, about 

 1 30 yards farther to the fouth ; 3 feet lower than before, or 

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

 fhaded from the fvin, expofed to the north, and about 30 feet 

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

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



METEO- 



