244 BATHYMETRICAL SURVEY OF 



On July 2, 1903, the surface was 28'4 feet above sea-level, which is 

 identical with the level found by the Ordnance Survey officers on July 19, 

 1876. The temperature varied less than half a degree from surface to 

 bottom. 



Surface. 55 0> 3 Fahr. 



10 feet 55-0 



25 55-0 



55 54-9 



Loch of Asia (see Plate CIII.) is a small loch just south of the Loch of 

 Ting wall, and the surroundings are similar, but the hills are lower, and 

 there is no marginal flat. There is rock on the west side, towards the 

 north ; on the east, where there is no beach, and the hill slopes steeply 

 into the loch, no rock was seen. The burn flows southward about a mile 

 into Cliff sound, close by Scalloway. There is rock in the stream close 

 below the loch. 



The loch is narrow and elongate from north to south, with a length of 

 half a mile, and greatest breadth of one-eighth of a mile. It is very 

 shallow, the greater part less than 6 feet deep, and a single sounding of 13 

 feet near the north end. The mean depth is 5 feet, the area 32 acres, and 

 the volume of water 7 millions of cubic feet. The level is barely 2 feet 

 lower than the Loch of Tingwall, viz. 26*6 feet above sea-level on July 2, 

 1903, which is nearly identical with that (26'5 feet) determined by the 

 Ordnance Survey on July 19, 1876. The drainage area, which includes 

 the Loch of Tingwall, is nearly 2 square miles. 



Loch of Brow (see Plate CIV.) is a small triangular loch in Dunrossness, 

 close to the east end of the Loch of Spiggie. The surrounding country is 

 low, rising highest on the north. The loch measures half a mile long, by 

 one-ninth of a mile broad near the east end. It is very shallow and almost 

 flat-bottomed, with a maximum depth of 6 feet and a mean depth of 2J 

 feet. It has an area of nearly 45 acres, and contains 5 millions of cubic 

 feet of water. Two streams enter at the east end, the chief being the Burn 

 of Hogarth, coming from the north, the area drained being a little over 

 a square mile. The outflow to the Loch of Spiggie is across a flat boggy 

 meadow, about one-eighth of a mile across. The level at the date of the 

 survey (July 3, 1903) was the same as Loch Spiggie, viz. 4-0 feet above 

 sea-level ; the Ordnance Survey officers found the level on September 1 9, 

 1876, to be 3'5 feet above the sea. 



The surface temperature was 58'5 Fahr. 



Loch of Spiggie (see Plate CIV.) is the only moderately large loch in 

 the southern part of Mainland. It is approximately oblong in shape, and 

 its long axis runs nearly north and south. The surrounding land is low, 

 and there are a number of farms on the shores of the loch. At the north 

 end are the Sands of Scousburgh. In length it is fourth among the lochs 



