THE FRESH-WATEE LOCHS OF SCOTLAND. 
173 
THE LOCHS OF MULL. 
The island of Mull (see Index Map, Fig. 20) was the scene of some of 
the preliminary work carried on by Sir John Murray and the late Mr. Fred. P. 
Pullar. With the small machine designed by Dr. Ule, they sounded 
PIG. 20. — INDEX MAP OP THE ISLAND OP MULL. 
Lochs Frisa, Ba, and Uisg, but, being led to doubt the trustworthiness of 
that machine, they never published the results, and Mr. Pullar set to work 
designing a new machine, which has since been used in sounding most of 
the Scottish lochs. At the time of the visit of the Lake Survey staff only 
