426 
PROFESSOR K. PEARSON AND MISS A. LEE ON THE DISTRIBUTION 
r4ac 
SoatE Coast . 
Wales .... 
Ireland .... 
NortE-west Coast 
NortE-east Coast. 
SoutE-east Coast. 
r St. Leonards 
< SoutEamjiton 
[ BabEacomEe 
r Carmarthen 
ChurcEstoke 
(_ Llandudno . 
pParsonstown 
^ Markree Castle* 
I Armagh . 
Londonderry . 
{ Stonylinrst . 
ScaleEy . 
Glasgow 
Laudale 
r Dunrobin Castle 
<( Dundee . 
1^ Scarborough . 
f Hillington . 
< Geldeston . 
[ ]\Iargate . 
of Record. 
Date. 
6 
Jan. 1, 
1880-Dec. 31, 
1885 
13 
?? 
1878- 
1890 
13 
1878- 
1890 
13 
1878- 
1890 
11 
?> 
1878- 
1888 
8 
5 ? 
1878- 
1885 
13 
5 ) 
1878- 
1890 
10 
1880- 
55 
1882 
1 . 
1884- 
1890 
5 
5 ? 
1886- 
1890 
7 
? 9 
1879- 
1885 
7 
1884- 
55 
1890 
6 
1880- 
55 
1885 
5 
5 5 
1886- 
1890 
11 
1880- 
1890 
8 
?? 
1883- 
1890 
11 
55 
1880- 
1890 
5 
55 
1881- 
1885 
13 
55 
1878- 
1890 
6 
5 5 
1880- 
1885 
8 
55 
1883- 
55 
1890 
The frequency distributiont has been calculated for every Jti reckoumg the 
frequency, any height falling midway between two-tenths inches (e.r/., 2875) has 
been split between those two-tenths (e.^., half to 287 and half to 28'8), 
Table I, of frequencies (p. 428) embraces the data from which the constants of the 
probability curves have been calculated. The lower or Roman figures in this table 
give the total number of days in which, during the years of observation, the 
barometer was at each particular height. The upper, or old-style figures, give the 
number of days per year at which the barometer (on the basis of these observations) 
may in the given locality be expected to be at each particular height. 
We do not consider that the Stations of the Second Order give the best possible 
returns. Far from it; the irregularities which occur in the frequency distributions 
at several of these stations seem to us to indicate that either the methods of 
observation, the instruments, or the fovmulce of reduction are not entirely satis¬ 
factory. It is probable that the Telegraph Stations Avould give far better results, 
and for a greater number of identical years. The ideal data would cover twenty or 
more well-distributed stations for identical periods of four “ lustra,” or twenty 
years. The observations of the Stations of the Second Order, however, were readily 
available in print, and our object has not been so much to make a contribution 
* Omissions occur in tEe record for 1883, so tEat year is not included. 
t Besides tEe above twenty stations, tEree telegrapE stations, Cambridge, London (Brixton), and 
Dover-Dungeness will be found to Eave tEeir constants recorded in oru' tables. TEe very great labour, 
liowever, of copying the manoscript records discouraged a larger selection of these stations. Our 
returns are for the thirteen years 1878-1890 inclusive. 
