844 
Proceedings of the Uoyal Society 
that after they fell sedimentary matter brought by water had 
been deposited. The largest of the blocks was round and smooth 
on its west side, rough and angular on its east side. Besides the 
blocks of stone, which were of the same nature as the rocks of 
Arthur’s Seat, there were in this bed of sand and clay blocks foreign 
to Arthur’s Seat (brought from the west probably), viz., red compact 
felspar, red syenitic porphyry, marine limestone, and clay iron- 
stone. 
At Easter Duddingstone the excavations for the ^Torth British 
Bailway exposed a number of large boulders embedded in the stiff 
blue till. Two of the boulders were of Old Bed Sandstone Con- 
glomerate — one an old porphyry, one a black basalt — rocks not 
existing in the immediate neighbourhood, but belonging to localities 
in the far west. Most of them were on their upper surfaces flat, 
smooth, and striated, the striae running in directions varying 
between hT.W. and 
At the sea-shore, between Joppa and Magdalen Bridge, the Con- 
vener examined many large boulders sticking in the blue till, most 
of them flattened on their upper surfaces with striae pointing 
Several presented smoothings and furrows on their west 
sides, none on their east sides. One of the boulders presented two 
sets of striae — one running hJ.X.W., the other running W. by S., 
the former partly obliterated by the latter, which therefore must 
have been the more recent. 
3. Dalmahoy . — Two boulders, one 13 x 10 x 6 feet, and the 
other 10x8x5 feet, lie at the side of the Water of Leith. The 
longer axis of both is E. and W. Both were covered with striae 
also running E. and W. {Sixth Report, p. 27). 
4. Craiglochhart . — Excavations were made in boulder clay for a 
hydropathic establishment. A number of boulders were seen by 
Convener in their original undisturbed positions. There were several 
of sandstone. The contractor for the building, having his attention 
drawn to these by the Convener, was asked if he knew any locality 
where there was sandstone rock of the same variety ? He said that 
the sandstone rock quarried extensively at Hailes and at Bedhall was 
exactly the same. On being asked to indicate the situation of these 
quarries, he pointed in a direction H.W. (by compass), distant about 
a mile. 
