[ ] 
XXXY. 
Q-^ THE EANGE OE ELOWEEIT^-G PLAOTS AISTD EEEITS OJST 
THE MOUJ^TAINS OE IRELAND. By Heney Chichester 
Haet, B.A., E.L.S. 
[Communicated by A. G. More, M.R.I.A.] 
[Read June 9, 1890.] 
The following remarks are the result of seven or eight years' 
botanizing in the Irish mountains. In carrying out these explora- 
tions, I was indebted to the Eoyal Irish Academy for assistance and for 
the ultimate publication of the various Reports on Districts with which 
I furnished them (vide p. 570). Other observations of my own are em- 
bodied in this summary, and I have gleaned what plant altitudes were 
of service from the Cylele Mihernica. A Eeport on the Ben Bulben 
plants, by E. M. Barrington, published in these Proceedings (Vol. iv., 
Ser. II., p. 493), has also been made use of. Eor about nine-tenths of 
the total observations, I am solely responsible.^ 
My altitudes were taken invariably with the same pocket aneroid, 
an excellent one by Messrs. Troughton and Simms. I kept another 
in harmony with it, leaving it behind, and checking for diurnal 
variations by it on my return each day, but I was usually able to 
check my work at intervals during the day by means of the excellent 
Ordnance Survey maps (inch to the mile), which I was never without. 
Working a mountain, I would, of course, repeatedly reach the sum- 
mit — a known height — and usually, also, I had mountain lakes, with 
a given altitude as a basis. Thus I could hardly err more than to a 
slight extent in most instances, especially as the Alpines, which were 
carefully attended to, commonly occur in the wet rills and declivities 
overhanging such lakes. 
I cannot pretend either to have developed any interesting generali- 
zation, nor yet that I have exhausted the subject. Possibly some one 
better able to theorize may derive some slight assistance in the climato- 
^ Since the present Paper was written, the Flora of North East Ireland, by 
Messrs. Stewart and Corry, has been published. From it I have extracted some 
thirty observations relating to that district. 
