60 
Barometrical and trigonometrical heights of the hills and mountains in Mayo. 
ea 
| Feet over the Sea. 
Barometrically. | Trigonometrically. 
Maroguin : - : : 122 
Glen-hill , 3 . ; 481 
Gortmore : . : 794 
Aughalasheen 5 : 5 409 
Glencastle-hill : . . 755 
Knocklettacuss ° 5 . 1596 
Trista-hill : 3 5 429 
Slieve Carn : ‘ : oss 829 
Mullranageegh - . : aoe 396 
Croghan . - : : $3 690 
Kelgarrow 5 . : op 650 
Mulaghanoe : . : ao 744 
Bockagh : : : eee 702 
Brusnagh 5 . . nD 622 
Cappagh ° : . i 474 
Knock : : aes 385 
Farnaan c . ‘ se 377 
Kiltulla : . : ste 415 
Farm-hill - : c : a 307 
Greenwood : . . ace 887 
Carn Mask . . : eee 184 
Kellroe . . : . see 262. = 
Benleva (East Carn) County Galway . ee 1225 
The Barometers used were those of Sir Henry 
Englefield. 
NOTE. 
In determining the heights barometrically two barometers were used, one remained stationary 
at a given point, where observations were made at given intervals of time, and the other carried 
up over the hills and mountain ridges, where corresponding ones were taken. From the number 
of elevations I have been enabled to execute a model of the Barony of Morrisk, which contains 
one hundred and eighteen square miles of the most elevated part of Mayo, and another of the 
Island of Achill, the largest island on the coast of Ireland, containing thirty-six square miles of 
very lofty ground. The Model of Morrisk is seven feet six inches by five feet. Achill model is 
five feet three inches by three feet ten inches ; they represent all the roads, lakes, rivers, rising 
grounds, hills, mountains, houses, villages, towns, &c. &c. &c.—The horizontal and perpendicular 
scales of the models are five inches to the Irish mile.—It is to be regretted, when the great survey 
of England was begun, that the country had not been modelled as the survey advanced, 
whereby the whole elevations of England should have been correctly determined for the construc- 
tion of the Model, and the heights engraven on the maps published by the Board of Ordnance 
would then have added considerably to their merit. A model on a scale of four inches to the 
mile of Great Britain and Ireland with their numerous isles, the long, broken, indented outline of 
coast, the lofty extensive ranges of mountains in Wales, Scotland, Ireland, and the islands, 
would give a character and expression to this work of art which could not be surpassed. 
