[ ns ] 



TABLE II. 



Mean Tempsratures of Places diftant^ow the Sea, <?W elevated above 



its Surface. 



Lat. 55° Medium temperature* in the neighbourhood 



of Londonderry, diftant twenty Iri/h\ miles from 

 the northern fea, and at a fuppofed elevation of 

 one hundred feet above it (1788) - 46,9 



Lat. 54° 20' Medium temperature J in the neighbourhood 

 of Armagh, diftant twenty-five miles from the 

 Irifh Channel, and elevated about fifty-eight 

 feet above the coaft §, by means of a well fixty 

 feet deep funk to the bottom of a gravelly hill, 

 (1788) 47,5 



• Obferved by William Patterfon, Efq; M. D. 



f 544- Irifli miles are almpft equal to a degree of the meridian, that is to 60 geo» 

 graphical miles, or to 694. Jinglifti miles. 



X Obferved by the Rev. Dean Hamilton. 



§ This elevation is prefumed from the following circumftancei : 



Feet. 

 Elevation of Lough Neagh above the fea, from obfervations (fee WhitiuortVs 



Reports ) that have lately been found extremely corredl - - . og 



From Lough Neagh to Blackwater town, through a diftance of feven or eight 

 miles, the river Blackwater is navigable, and extremely ftill, fo that its fall 

 cannot exceed " - - - - _ - \o 



From Blackwater town to the valley of Armagh is a direfl diftance of about 

 four miles ; for that fpace the elevation here marked is only the refult of con- 

 jeclure . - - _ . . - 10 



Total - - . j8 



X 2 Lat. 



