SEA-FISHERIES LABORATORY. 



439 



tide, I have seen sewage lying on the shore. The only 

 spot which seems at all safe at present for purification 

 tanks is Penrhyn Point or its neighbourhood. A number 

 of stones are thrown up on this part of the shore, which 

 is in the nature of a storm beach, and if tanks were con- 

 structed, some method would have to be devised to keep 

 them free from such stones. Although there is no tidal 

 set in this direction, nevertheless, with a N.W. wind 

 surface water would be blown across from the vicinity of 

 the sewer outfall. 



It seems as if, quite apart from mussels, some repairs 

 will have to be carried out on the harbour sewer pipe, 

 which is in a bad state. If, when this is done, several 

 more lengths could be added, the flap refixed, and another 

 method found of draining the houses on AberamfPra cliff, 

 the mussels at Aberamffra should be rendered absolutely 

 safe. 



Hydrographical Readings. 



The hydrometer readings do not call for any special 

 comment, being fairly consistent and presenting nothing 

 abnormal. As at Aberdovey, the effect of the flood is not 

 felt in the estuary for one hour or more after it has been 

 running outside the bar, and there is a considerable 

 banking up of fresh water on the turn of the tide. 



April 6th, 1914.— Neaps ; first high tide, 5.0 a.m. ; readings taken from 

 3.10 p.m. to 3.20 on half flood; fresh Westerly breeze. 



Station. 



Air Temperature. 

 Readings taken 10 a.m. 



Water 

 Temporal are. 



Specific Gravity. 



2 

 3 

 4 

 5 

 6 



1M°C. 



>> 



9-4°C. 



9-3 



9-1 

 9-2 

 9-4 



L-0256 

 H)26fl 

 1-0256 

 10261 



1 0240 



