194 REPORT OF THE RAIN GAUGES. 
marked in inches and tenths of an inch, which 
rising through a small hole at the bottom of the 
funnel, exactly indicates the depth of rain falling 
in any given time. The surface of the water in 
the cylinder being completely covered with the 
float, except the mere annular space of about 
one-eighth of an inch,—no evaporation takes place. 
The gauge must be occasionally emptied of the 
water it contains. It is sunk in the ground, 
within a strong box or case to prevent injury, 
and to allow of its being easily taken out; the 
top of the gauge being left about ten or twelve 
inches above the ground. 
Gauges of this description were accordingly, 
at the commencement of last year, fixed in the 
ground, at or near all the places at which obser- 
vations had hitherto been made by the Rochdale 
Canal Company, except Ripponden, where they 
had been discontinued. The gauge at Stubbins 
was stolen, after remaining a few months, but at 
all the other places the observations have been 
continued throughout the year, by the same 
persons, who had the charge of the Canal Com- 
pany’s gauges. 
On the Ashton canal, no gauges remained on 
the top of the house, but on the Peak Forest 
