No. II. 



MEASUREMENTS 



RRFERRED TO IN 



THE REPORT OF THE COMMITTEE OF SCIENCE, 



DATED MAECH 13, 1852. 



Northern Stations. 



Donaghadee. — 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 to a hench-rnark 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. 



Portrdsh August 23. The zero of the tide-gauge was found 



to be 12-58 feet below the bench-mark on the pier. 



Rathmullan. — August 26. There is no Ordnance bench-mark 

 near to this station. The zero of the tide-gauge was found to be 

 2020 feet below the upper surface of the corner coping-stone at the 

 southern end of the pier. 



Killybegs. — 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. 



Kingstown. — 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 



