256 Proceedings of the Royal Irish Academy. 
That which would so largely affect the records of temperature 
would also, as it appears to me, produce a certain amount of useful 
effect on the records of pressure. And the materials for at once 
applying the proposed reduction to the barometric heights have 
already been computed for fourteen of the telegraphic stations, and 
will be found in the table of mean monthly pressures given on p. 10 
of the Appendix to the Quarterly Weather Report" for the first 
quarter of the year 1870. From this table, the annual curves of 
pressure at each of these stations can easily be constructed, and by 
entering on the map the differences between the observed pressure on 
each day, and the mean for that day at each station, we should obtain 
a barometric chart more intimately connected with the weather than 
the present charts. 
The same treatment could easily be applied to the rainfall, and 
with very considerable effect, for local influences often disguise that 
portion of the effect produced by the character of the weather, and the 
element due to local influence would be removed by the treatment I 
propose. 
Ultimately it would be possible to extend the same treatment to 
the direction and pressure of the wind, and to the state of the sky. 
But the former of these at least would require prolonged and skilful 
observation to detect how far the direction and the intensity of the 
wind was modifi.ed by local circumstances, By a careful observation 
of cyclones, however, I think it would probably be possible to do this. 
Thus, for example, I think it appears from the materials collected in 
the memoir on the Meteorology of Ireland, by the Provost of Trinity 
College, Dublin, that the direction of the wind at Dublin usually 
varies in the direction which is called backing, from what it would 
have been were it not for local circumstances. I would, however, be 
understood to mention this presumption not as an ascertained fact, but 
only to illustrate a method. 
XXXII. — On" EECENT Additions to the Flora, of Ieeland. By 
A. G. MoBE, F. L. S., M. R. 1. A. 
[Eead June 10, 1872.] 
The present Paper originated in a desire to review the progress that 
has been made during the past six years in investigating the localities 
and distribution of Irish Plants; and I have, therefore, with the help of 
my friend and partner, Dr. Moore, put together in a connected form 
the several items of information which have accumulated up to this 
time, from various sources, and which, together with the results of our 
own occasional excursions, will furnish a tolerably complete record of 
what has been done since the summer of 1866, when our book, the 
Contributions towards a Cybele Hibernica" appeared. 
In a country so well known as Ireland, that has been searched 
botanically, since the time of Threlkeld and Patrick Browne .]by 
