30 
self-recording machine. Neglecting periods when there 
was rain, it was quite clear from the observations that 
whenever there was a rapid fall of the barometer there 
was an increase of the quantity of water flowing, while 
a rapid rise in the barometer caused a diminution in 
the volume flowing, as the following examples will 
show. 
“ist. The barometer commenced to fall on the 
24th February, 1881, and fell until the 28th. 
The Bourne flow during this time increased from 
357°6 cube feet per minute on the 24th to 387-4 
cube feet per minute on the 26th. The baromete1 
began to rise on the 28th February, and rose until 
the 2nd March, and then commenced to fall. The 
Bourne flow diminished from 379°0 cube feet per 
minute on the 28th February to 345°3 cube feet 
per minute on the Ist March There was a very 
marked depression in the Bourne flow during the 
period of the rise of the barometer. The prevail- 
ing winds during the period of these observations 
were easterly. 
*¢ 2nd. On the 11th March, 1881, the barometer 
commenced to fall, and fell until the 14th, when 
it commenced to rise. The Bourne flow increased 
from 511:4 cube feet per minute on the 11th March 
to 568°2 cube feet per minute on the 14th March. 
With the rise of the barometer the flow diminished. 
From the 15th to the 17th during all the period 
the barometer was rising there was a marked 
diminution in the Bourne flow. The wind during 
the period of these observations was north-west 
and south-east. 
“3rd. The barometer began to fall, on the 27th 
