Proceedings. 167 
It is therefore to be concluded that there must have been something 
faulty in the Aneroid, which, in the skilful hands and under the 
careful observation of Captain Kay, ceased to act on the side of 
Mount Wellington at a higher level than 3500 feet. 
On the table land of Ben Lomond, Mr. Milligan observed a variety 
of Ranunculus Gunnianus, the Phebalium montanum, and a Westringia, 
probably rigida in flower, and the prostrate Gaultheria, (in fruit), 
found abundantly on the western side of Tasmania, about 1000 
to 2000 feet above the sea-level, &c. 
During the descent from Ben Lomond towards Fingal, a vertical 
escarpment of columns of greenstone is succeeded by a talus, formed 
of the debris of the same rocks, extending for some miles, and 
concealing all original geological facts between the mountain and 
the ridges of hard clay-slate (interlaid with seams or beds of quartz), 
which stretch in succession as far as the level of the South Ksk, 
where a soft talcose schist exists, interlaminated also with quartz, 
and doubtless highly metalliferous, as it is probable much of the 
north-east portion of Van Diemen’s Land will ultimately prove to be. 
Mr. Milligan walked across the rugged country between Fingal 
and the Douglas River, and thence to St. Paul’s Plains by way of 
the rich agricultural Vale of St. Alban’s, through which the sluggish 
River Apsley (finally losing itself in a large marsh) flows. The 
tract of country thus diagonally intersected in two different direc- 
tions is of greenstone, of the same character as Ben Lomond, but of 
far inferior elevation, and surrounded on three sides with primary 
or transitionrocks, at a comparatively low level, where portions 
of the carboniferous series are seen dipping slightly under the green- 
stone, in beds departing but little from the horizontal position. The 
“Dome of St. Paul’s” is greenstone, supported by granite and 
Silurian limestone: a ridge of granite traverses the valley of St. 
Paul’s, and exhibits on its surface and western side patches of the 
Silurian series,—in some places sufficiently calcareous to yield good 
lime, and in others converted into a cherty and siliceous substance, 
as hard as quartz rock: the granite is here richly interspersed, and 
veined with varieties of schorl and tourmaline. The hills on the 
western and southern side of the St. Paul’s Valley consist of coal sand- 
stones, with bituminous coal-seams, capped as usual with greenstone. 
Specimens from the various rocks mentioned were placed before the 
meeting by the Secretary. 
