SBHA-FISHERIES LABORATORY. YAY 
I: From a pool on the Morfa Beach, well up the 
foreshore, in line with No. 6 Red Buoy on 
Great Orme’s Ilead. 
II. From the Channel as near as possible to the 
place where sample No. 1 was taken. 
Ill. From the Channel further up the KMstuary and 
nearly opposite the Perch. 
Nine plates were made, using 1 c.c. of water in each case, 
and the results are as follows : — 
Conway Estuary: NumsBers or “ CoLon-LIKE’”’ BACTERIA 
PER C.C. 
Sample I—Sterile, (sterile), (sterile); average 0 
”? I[—8, (13), (6) oy) ) 
» LLI—80, (15), (13) i 19 
each sample being examined in triplicate. 
There seemed no doubt then that the water of the 
foreshore, well above low water mark, was much more 
pure than that in the Fstuary during the last of the ebb 
tide. A later series of analyses of the latter water (2nd 
December, 1908, neap tide, at about low water), based on 
duplicate determinations of the bacterial contents of six 
samples collected between the Perch and Benarth Point 
(above the Conway Bridges), gave 35 as the average 
numbers of “ colon-like ’ organisms per c.c. At the same 
time that I examined the water from Morfa Beach, a 
similar analysis was made by Professor Klein, and Mr. J. 
Wrench Towse informs me that Professor Klein reported 
that the water was “ quite passable.” 
It seems very likely, then, that the water covering 
this part of Morfa Beach is much more pure than the 
water covering the mussels 1a the Conway Channel; and 
it is probable that if decidedly polluted shell-fish were 
