XII. Meteorological Abstract j^r /^<? Years 1794, 1795, 

 and 1 796. Communicated by John Playfair^ F. R. S. 

 Edin. and Profeffor of Mathematics in the Univerfity of 

 Edinburgh. 



[Read at the Meetings in Feb. 1795, 1796, & 1797.] 



THE Journal of the Weather, of which an abflradl is here 

 communicated, has been kept in a houfe in Windmill 

 Street, on the fouth fide of Edinburgh. The latitude of 

 Edinburgh College, as deduced from a feries of aftronomical 

 obfervations made at Hawkhill, is ^^°. 57'. ^'' nearly. Wind- 

 mill Street is about 500 yards farther to the fouth. 



The barometer ufed in thefe obfervations is a portable one,, 

 of the conflrudlion invented byDrLiND, phyfician at Windfor; 

 the mercury was boiled in the tube, and the fcale is divided in- 

 to the five-hundredth parts of an inch. The place where it 

 ftands is 265 feet above the level of the fea, or of the mean 

 high-water mark at Leith. The height of it is marked every 

 morning at 10 o'clock, as well as that of a thermometer, in the. 

 fame room, which gives the temperature of the mercury. 



The thermometer, which gives the temperature of the air, is 

 placed on the outfide of a window that looks tov/ards the N. W.. 



about 



