SEA-FISHERIES LABORATORY. 345 



Head. We had hoped possibly to get observations from 

 as far out as St. Kilda, but that was found to be 

 impracticable in the series of gales we encountered during 

 that exceptionally unsettled summer. 



The same types of nets and instruments were used as 

 on the previous cruises — the Nansen net (with No. 20 

 silk) used on the Lucas Sounding Machine for vertical 

 hauls, various open tow-nets for horizontal surface work, 

 and the large shear-net for occasional hauls in the inter- 

 mediate waters ; the salinity readings were taken with 

 Kiel araometers, since tested by titration and corrected, 

 and the temperatures with the standardised Kiel 

 thermometers. The physical observations on this cruise 

 were all taken by George Herdman, and a list of these 

 in detail will be found at the end of this paper. 



The itinerary was as follows : — We left Port Erin 

 in the Isle of Man at 11-0 p.m. on July 30th, and reached 

 Lowlandman's Bay, in Jura, on the evening of July 31st, 

 and Oban on August 1st. For the next two days we were 

 taking observations in the Firth of Lorn round Kerrera 

 and Lismore islands, and reached Tobermory Bay, in 

 Mull, on the night of August 3rd. On the morning of 

 the 5th we took some vertical hauls in the deep water 

 at the north end of the Sound of Mull, and then crossed 

 the Sea-of-the-Hebrides by Hyskeir, in bad weather, to 

 Castle Bay, Barra. For ,the next two days we worked 

 round the south end of the Outer Hebrides, trawling and 

 taking tow-net samples and physical observations; and 

 then, on the morning of August 8th, started northwards 

 through the Sea-of-the-Hebrides past Barra, Eriskay, 

 the Uists, and the Long Island, taking three days to 

 reach Stornoway, in Lewis. During this traverse, 

 besides taking plankton hauls in the open sea, we entered 

 some of the lochs on the eastern side of the islands and 



