94 PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 
These beds were regularly interstratified with the igneous rock, here very 
friable and rotten. Apparently they consisted of a granular mixture of saponite 
with celadonite, and they carried softened and rounded granules of the rock 
matrix ; their whole appearance conveyed the impression that they resulted 
from the decomposition of the rock. 
A little eastward of this cutting a denser mass of the rock was laid open to 
afford a stance for the works connected with the building of the girders of the 
bridge. During the necessary blasting operations fine specimens of red chal- 
cedony were obtained, and the rock here rarely afforded in its rents, veins and 
lumps of a pure saponite much resembling a soft steatite. 
The colour is grass green, the structure dense and without any appearance 
of foliation ; it is opaque, unctuous to the touch, and cuts like soft slate-pencil. 
1-°207 grammes yielded— 
Silica, : : : . 42°839 
Alumina, . : : . 4°828 
Ferric Oxide, . : = 10° A96 
Ferrous Oxide, . A DS 
Manganous Oxide, . ; 22 
Lime, : ‘ : 2 162 
Magnesia, . : 2 Zirsi2 
Potash, . : , : trace 
Water, . E : . 920698 
101° 393 
Was apparently quite pure ; lost 13° 868 of the water at 212°. 
6. In clearing rock for the foundations of, and obtaining material wherewith 
to build a pier and patent slip at the harbour of Tayport, in Fife, some four 
miles from the last locality, the upper bed of the igneous rock was found to 
contain an abundance of agates, occasionally diversified by large nodules, which 
had more the appearance of celadonite than saponite, but which probably con- 
tained both. 
The lower bed was rendered strikingly beautiful in appearance by the 
quantity of lustrous white calcite which it contained ; this calcite was sheathed 
with a thin skin of brilliant red carnelian. 
A cutting, opened up some 400 yards west of this, in laying out the railway 
between Tayport and Newport, afforded the following substances :—Fibrous silky 
pilolite, highly lustrous and beautifully white ; yellow jasper, with a dendritic 
structure resembling corn-stooks ; druses, lined with an opaque mammillated 
and banded celadonite, and having a central core of translucent waxy saponite, 
and long pipe-shaped amygdules totally filled with the last-named mineral. 
