SEA-FISHERIES LABORATORY. 437 



channel above same, 20 yards off Aberarnffra Quay, prac- 

 tically touched Coes Faen, and then stood out to the South. 

 About 1^ hours later the float was seen aground on the 

 rocks at Coes Faen, doubtless having been carried round 

 by the eddy off the sandbank at that point. 



April 8th. — Fresh N.W. breeze: ebb tide. After 

 about 4 hours' ebb & float was dropped 15 yards outside the 

 sewer buoy. It ran about 150 yards straight down towards 

 the bar, and then crossed to the further bank, continuing 

 its course very close inshore. 



Another float released one hour later passed close 

 inshore past the beacon on the point of Ynys-y-Brawd, 

 and continued its way towards the bar about 10 yards out. 



April 9th. — Springs: strong S.S.W. breeze: ebb tide. 

 A float released on the ebb, about 1 hour earlier than on 

 April 8th, gave practically the same results, the course 

 followed being somewhat further out from the shore. 



Another float was dropped over the quayside at half- 

 ebb (10.15 a.m.) opposite the drain from the privies. At 

 low tide this was found high and dry, about 10 yards out 

 close to the spot of its release. At about 5 p.m. it was 

 refloated by the flood tide, and stood out into the main 

 channel, passing between the 7th and 8th piles of the 

 wooden railway bridge. 



Afternoon. — The float dropped at 4.30 p.m., at half- 

 flood, passed under the furthest span of the iron railway 

 bridge. From this point it was lost sight of, but we 

 believed that it stood out towards the south shore in the 

 direction of Fegla Fawr. 



Conclusions as to the Drift ok Sewage. 



The sewer which discharges into the harbour lias its 

 outfall marked by a buoy which is placed aboul |f)()-.~)i)i) 

 feet to the East of Trwyn-y-Gwaith, and originally waa 



