168 OBSERVATIONS ON THE FALL OF RAIN. 
cult in that country to find persons to attend 
properly to the gauges, but the result of our ex- 
perience, during those years, was to ascertain 
that of six feet of rain which fell upon the drain- 
age ground, four feet found its way to, and was 
impounded in the reservoir, besides allowing a 
quantity to run past it, sufficient to work some 
small corn and flax mills. 
In the year 1839 gauges were placed in suit- 
able positions across the Penine chain of Hills, 
pretty nearly along the line of the Manchester 
and Sheffield Road by way of Glossop, for the 
purpose of ascertaining the fall of rain at different 
elevations, over a tract of country which would 
form a fair average of the mountain drainage of 
the rivers which take their rise in that district. 
It was intended to have connected these observa- 
tions with others upon the quantity of water which 
flowed from the land as a supply to the rivers, 
but this has hitherto been found impracticable. 
The places chosen for fixing the rain gauges, 
were Ist, the westerly foot of the hills, in the val- 
ley of Hurst Brook near Glossop, about 500 feet 
