93 
expenses of these tours of inspection having been undertaken by 
the parties themselves, are thereby saved to the Academy. 
The following is a memorandum of the principal facts con- 
“nected with the several stations: 
East Coast Stations. 
Portrusu (Co. Antrim),—The tide-gauge is erected in an angle 
of the northern pier, close to the spot at which the tidal observa- 
tions were made in 1842. It was found necessary, however, to 
deepen the spot by the removal of rubble, and to protect the dial, 
by cross beams of timber, from the hawsers of vessels approaching 
the quay. The zero of the tide-gauge is 12-33 feet below the bench- 
mark on the quay. 
The barometer is put up in the guard-house, which is situated 
on an eminence facing the harbour ; and the thermometers and the 
rain-gauge in a small attached garden. The height of the cistern 
of the barometer, above the bench-mark, is 23:4 feet. The diameter 
of the tube is 0:28 of aninch. The four thermometers at this, 
and at every other station, are inclosed in a shallow box with a 
sloping roof, open in front. 
A vertical gnomon is fixed in the window sill of the guard-house, 
for the purpose of deducing the time of noon; and the observers 
are furnished at this, and at all the other stations, with a table of 
the equation of time computed for the present year, and for the mean 
longitude of Ireland. 
CusHENDALL (Co. Antrim).—The tide-gauge is erected on the 
landward side of the new pier in Red Bay. The pier not being 
completed, it was found necessary to place the gauge at some little 
distance, so as to stand clear of the sloping side. It is fixed in its 
place by a frame-work of wooden spars, bound together by ropes 
and chains ; and is connected with the pier by a platform, on which 
a hurricane-house is erected for the shelter of the observer. The 
time of noon is obtained from a meridian line, marked by a picket 
driven into the ground, to the north of the coast-guard flag-staff. 
No meteorological observations are taken at this station. 
DonacuangE (Co. Down).—This ‘is an excellent station for both 
meteorological and tidal observations. The tide-gauge is erected on 
