58 
he finds that mercury thoroughly boiled in clean glass tubes 
does not show a convex surface, but adheres strongly to the 
glass. However he has confidence in giving the following 
results in working with his apparatus, with acid of various 
strength, obtained by successive dilutions of sulphuric acid, 
. 1.845 by volume. 
Sulphuric 
Acid. Water. 
Pressure in Inches 
of Mercury. 
3 
+ 
0 
Inappreciable. 
3 
+ 
1 
Inappreciable. 
3 
+ 
2 
0-01 at 70° 
1 
+ 
1 
0-03 at 63° 
1 
+ 
2 
0-15 at 63° 
1 
+ 
4 
0-30 at 55° 
0 
+ 
1 
0'37 a,t 47° 
“ Notes on supposed Glacial Action in the Deposition of 
Hematite Iron Ores in the Furness r .trict,” by William 
Brockbank, F.G.S. 
The hematite iron ore deposits in le Furness district 
are of two very distinct varieties — (1) dose filling hollows 
in the limestone, covered only by the 'st tertiary gravels 
and clays, and (2) Those occurring i. the carboniferous 
limestone in veins, and large irregular & ties, or “ pockets.” 
The summit of the mining district o Dalton-in-Furness 
is High Haume, which rises about 508 eet above the level 
of the sea, and is of Silurian age ; Conif on limestone, grits 
and flags ; upon whose flanks rests the arboniferous lime- 
stone. The uplifting of this central c xe tilted the lime- 
stones, so that they dip very quickly to wards the S.E., and 
broke them up into a succession of reefs, the outcrops form- 
ing a parallel series of ridges from W. to E., each marked 
out on the surface by lines of iron ore workings. 
The source of the hematite ore appears to have been, here 
as elsewhere, at or about the junction of the Silurian slates 
with the carboniferous limestone ; and it found its way into 
