Fig. 10. — Sample -2. 

 Sound of Mull, 20 faths 



Fig. 11 —Sample 1. 

 Lowlandman's Bay, 5 faths. 



Fig. 12. — Sample 3. 



Oft' Ardnamurchan, 



20 faths. 



(Fine material.) 



Pig. L3. Sample 3. 



I hi Ardnamurchan, 



20 Eaths. 



(Coarse material.) 



Photo, by A. !■;. Smith. 



