THE FRESH-WATER LOCHS OF SCOTLAND 
57 
These analyses seem to show that the upper layer contained more 
organic matter (presumably vegetable matter) and a little more iron 
than the lower layer. Microscopic analysis of the two layers indicates 
that the mineral particles were rather more numerous and larger in the 
top layer, while the clayey matter seemed to be more abundant in the 
lower layer. 
Loch Garry (see Plate XV.). — Loch Garry‘S" lies to the east of Loch 
Ericht, at a still higher elevation, and the scenery round about is very 
wild ; the height of the surface of the loch above sea-level is not given 
on the Ordnance Survey map, but a height of 1326 feet is shown near 
the outlet, so that the level of the loch is probably about 1320 feet above 
the sea. In trend and in outline it somewhat resembles Loch Ericht, 
narrowing towards the northern end. It is over 2^ miles in length, 
the maximum width being over a quarter of a mile ; the mean breadth 
is slightly under a quarter of a mile (being 9 per cent, of the length). 
Its waters cover an area of about 390 acres (three-fifths of a square 
mile), and it drains an area thirty-seven times greater (or about 22 J 
square miles). The total number of soundings taken in Loch Garry was 
141, the maximum depth observed being 113 feet. The mass of water 
contained in the loch is estimated at about 846,000,000 cubic feet, and 
the mean depth at nearly 50 feet (being 44 per cent, of the maximum 
depth). The length of the loch is 119 times the maximum depth, and 
260 times the mean depth. 
Loch Garry forms a simple basin, except that the bottom sinks into 
two depressions exceeding 100 feet in depth, separated by depths of 82 
to 93 feet. The larger but shallower depression is situated in the 
southern half of the loch, and is over a quarter of a mile in length, the 
maximum depth therein observed being 105 feet. The smaller but 
deeper depression is situated in the northern half of the loch, being only 
about one-sixth of a mile in length, and containing the maximum depth 
of the loch — 113 feet. The 75-feet, 50-feet, and 25-feet depressions form 
continuous areas, following approximately the outline of the loch. The 
75-feet depression is nearly 1| miles in length, the 50-feet depression 
nearly 2 miles in length, and the 25-feet depression 2J miles in length. 
The area of the bottom between the shore and the 25-feet contour- 
line is about 117 acres (or 30 per cent, of the total area of the loch); 
that between the 25- and 50-feet contour-lines is about 83 acres (or 21 
per cent.); that between 50 and 75 feet is almost the same; that 
between 75 and 100 feet is about 87 acres (or 22 per cent.); and that 
over 100 feet is about 19 acres (or 5 per cent.). 
Temperature Observations . — The serial temperatures taken while 
sounding out Lochs Ericht and Garry in June, 1900, are given in the 
This loch must not be confounded with the larger Loch Garry in Inverness-shire. 
