SKETCH OF WORKING-PLAN. 6 1 



Meteorological Conditions} — The average annual rainfall for 

 the period 1884 to T903 was 44*67 inches. The highest rainfall 

 recorded was 65*98 inches (in 1903), while the lowest was 

 32-67 (in 1889). The rainfall at Fort Augustus is greater than 

 that of Inverness, and smaller than that of Fort William. There 

 is seldom snow on the lower ground, owing to the fact that the 

 straightness of Glen Mor facilitates the access of the air from 

 either coast. It is a very striking fact that the snow-line in some 

 of the side glens, e.g. Glen Tarff, is often considerably lower 

 than that in Glen Mor itself. 



The prevailing wind is south-west, and next to it in frequency 

 comes the north-east wind. Peculiar gusty gales blow occasion- 

 ally from the south-east. 



The temperature is free from great extremes. The mean 

 annual temperature (thermometers in shade) for the period 1897 

 to 1906 was 46-06° F. The highest temperature in the shade 

 was recorded on the 2nd September 1906 with 86-9° F., and the 

 lowest, quite an exception, on the 28th January 191 o, with 

 i'9° F. For this period (1897-1906) the mean annual humidity 

 of the atmosphere was 83-87 percent; and in the same period 

 the average number of hours of bright sunshine per annum was 

 1002-96. 



Geology.'- — The area to be aflforested in Glen Moriston and along 

 the Great Glen from the mouth of the river Moriston to Invergary, 

 has not yet been surveyed by the Geological Survey. But, so 

 far as our present knowledge goes, it is believed that the rocks 

 entering into the structure of this region belong partly to the 

 metamorphic series of the Highlands and partly to the Old Red 

 Sandstone. The latter form a narrow belt along the north-east 

 side of Loch Oich, and extend north-eastwards, by Aberchalder 

 House, towards Culachy. The remainder of the area is occupied 

 by the metamorphic series, which comprises crystalline schists 

 belonging to the Monic Series of the Geological Survey. These 

 consist of quartzose flagstones, quartz-biotite-granulites and 

 mica schists, which have an extensive development on both sides 

 of the Great Glen. They represent sandy and clayey sediments 

 which have been converted into crystalline schists by various 



^ The nole.s on the meteorological conditions were kindly supplied by 

 Rev. Cyril von Dieckhoff, St Benedict's Abbey, Fort Augustus. 



- The geological notes were kindly supplied by Dr Ilornc, Director of the 

 Geological Survey, Edinburgh. 



