y 
Air Rg Petes x 
. 
No. II. 
MEASUREMENTS 
RRFERRED TO IN 
THE REPORT OF THE COMMITTEE OF SCIENCE, 
DATED MARCH 18, 1852. 
eee 
Northern Stations. 
‘DonacHavEE.—August 15. The height of the zero of the tide- 
gauge was measured, and the result found to accord with that of the 
former measurement in 1850. 
CusHENDALL.— August 18. A levelling was taken from the zero 
of the tide-gauge toa bench-mark on the wall at the road-side north 
of the tunnel, above the pier. The difference of level was found to 
be 34-74 feet. 
_ PorrrusH.—August 23. The zero of the tide-gauge was found 
to be 12°58 feet below the bench-mark on the pier. 
_ Raramoiian.—August 26. There is no Ordnance bench-mark 
near to this station. The zero of the tide-gauge was found to be 
20°20 feet below the upper surface of the corner coping-stone at the 
southern end of the pier. 
Kitiysees.—August 28. The zero of the tide-pole is 18-00 feet 
below the coping-stone of the pier, to which it is attached. The 
correspondence of the figures on the second tide-pole was verified 
by simultaneous observations. 
Kinestown.—October 17. The difference of level between the 
zero of the tide-gauge, and the copper bolt in the coping-stone of 
the pier near the water-tank, was ascertained by simultaneous ob- 
servations, and found to be 18°28 feet. 
Southern Stations. 
Bunown.—August 19. There is no bench-mark at this station. 
The zero of the tide-gauge was compared with the upper surface of 
VOL. V. b 
