[ '5- ] 



at a rate nearly equal to one degree of temperature for each 

 degree of latitude. 



The fecond table marks the temperature of places in the 

 kingdom, which are not fituated on the fea coall. From this 

 we have fome data for inferring the effeds which arife in con- 

 fequence of diftance from the fea, and elevation. Thus it will 

 be found, that the country adjoining to TuUamore in the King's 

 county, near the centre of the kingdom, about Ji/iy miles diftant 

 from the Irifh channel on one fide, and as much from the weftern 

 ocean at the bay of Galway on the other fide of Ireland, gradually 

 elevated to the height of tisoo hundred and Jix feet above the level of 

 the fea*, and not very far beneath the higheft point o£ the general 

 furfacc of our ifland f , pofi"efl!es a mean temperature nearly corres- 

 ponding to a fituation on the coaft two degrees more northerly. 



In 



• The elevation of the country at Tullamore is thus proved: 



Feet. 



Elevation of the Canal bafon at Jaraes's-ftreet, in Dublin, above the mean 

 height of the tide at the Marine fchool on the river LifFey, iy obfi-rvatioiis 

 made for the Canal Company, - - - _ gy x 



Elevation of the fiimmit level of the Ganal above the Bafon in James's- 

 ftreet. See Brownrigg's Survey, - - _ _ 202— 



Total elevation of fummit level, - - 270 



Depreffion of Tullamore, below the fummit level. See Jiatement laid 

 lefore Parltamenty - - - -6^ 



Hence elevation of Tullamore above the mean height of the tide in the 

 river Liffey - - - . _ 206 



f It may fcem ftrange that a tra£l of country full of morafles, fliould neverthelefs, 

 be marked as almoft the higheft part of the general furface of the kingdom ; yet there 



