264 FORESTS, WOODS, AND TREES 



The Airdrie, Coatbridge, and District Water Trust obtain 

 their water supply from two catchment areas, which are 

 held as freehold — Rough Rigg, acquired in 1846, and Cowgill 

 in 1893. The catchment area of the Rough Rigg reservoir, 

 2100 acres, at 687 to 900 feet elevation, lies to the east of 

 Airdrie, near Clarkston, and consists of grazing and arable 

 land. Cowgill reservoir has a gathering ground of 1390 

 acres, between 1000 and 2000 feet, east of Lamington in 

 Clydesdale, all under grazing except 1 3 acres of plantations. 

 No schemes for planting trees have been contemplated. 



IV. LoTHiANs, Peebles, Berwick, Selkirk, and 

 Roxburgh Counties 



Gathering grounds, 30,382 acres, supplying thirteen 

 local authorities. 6690 acres owned by three local 

 authorities. 



Edinburgh obtains its water supply from three localities : 

 the Pentland Hills, the Moorfoot Hills, and the Talla area 

 in Peeblesshire. 



The water supply from the Pentland Hills is mainly 

 from springs, none of the surface water being utilised ex- 

 cept in the case of the Glencorse area. A description of 

 these springvS and of the various reservoirs which have been 

 built on the north side of the Pentlands to provide compen- 

 sation water, etc., is given by Mr. A. Leslie in Proc. Inst. 

 Civil Engineers, vol. 74, pp. 91-127 (1883), and need not 

 be repeated here, as there is no necessity on hygienic 

 grounds to afforest the areas in which these reservoirs are 

 situated. Mr. Leslie explains that " the configuration of 

 the north side of the Pentlands would not permit of a sur- 

 face water scheme being adopted for Edinburgh as the water 

 is almost always coloured with peat, and in wet weather 

 very much so." The Glencorse valley, on the south side of 

 the Pentlands, the surface water of which is used, has a 

 catchment area of 3825 acres, situated between 750 and 

 1750 feet elevation, comprising : 



