148 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Man by Mr. Holt. The lino from the Calf of Man to 



Holyhead still remained as before. 



In May, 1907, the area under investigation was 

 extended somewhat, an additional line of soundings being 

 run across Carnarvon and Cardigan Bays. 



The water samples, except those from the surface, 

 have always been collected by means of a Nansen- 

 Pettersson water-bottle, while the temperatures have been 

 taken with the usual pattern of thermometer used in the 

 International Fishery Investigations. The titrations of 

 the water samples have been carried out in the usual way 

 by Mohr's method," and the salinities, etc. calculated by 

 means of Knudsen's Hydrographic tables. The titrations 

 have all been done by myself, but I have only occasionally 

 been able to go out on the steamer collecting the samples. 

 The latter have usually been obtained by my colleague, 

 Mr. -James Johnstone, whom I have much pleasure in 

 thanking for this and much other assistance. 



My thanks are also due to Captain A. Wignall, of the 

 " John Fell," the steamer of the Lancashire and Western 

 Sea-Fisheries Committee, from which all the observations 

 have been made, for the skill with which he has fixed the 

 positions of the soundings. 



The salinites and other details for the various 

 stations are given in the following tables. The 

 first column gives the depth in metres ; T° is the 

 temperature (Centigrade) of the water in situ ; CI °/ 00 i g 

 the amount of chlorine per 1000 parts of water as found 



by the titration; S %o is the salinity: and 1 + : uv\ft S^ ves 



the density of the sample of water at the temperature T°. 



The position of the station and the date on which the 



samples were collected are given above each table. 



- ;: For details of the method as applied to hydrographic work, see Niels 

 Bjerrum, Meddelelser fra Kommissionen for Havundersogelser. Serie : 

 Hydrografi. Vol. I, No. 3.— Copenhagen, 1904. 



