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Transactions. 39 
understood, I beg to submit the following measurements :—The 
existing Bridge consists of six arches, and beginning at the Max- 
welltown side the dimensions are—lst arch, 32 feet 4 inches wide ; 
1st pier, 15 feet 2 inches wide; 2d arch, 27 feet wide; 2d pier, 14 feet 
6inches wide; 3d arch, 28 feet 2inches wide; 3d pier, 15 feet 2inches 
wide ; 4th arch, 27 feet 9 inches wide ; 4th pier, 15 feet 2 inches 
wide ; 5th arch, 27 feet 7 inches wide; 5th pier, 15 feet 1 inch 
wide ; 6th arch, 35 feet 5 inches wide. Total between the abut- 
ments, 253 feet 4 inches. The distance between the face of 
the east abutment now found and the west side of the sixth pier, 
which now forms the east abutment, measures 113 feet 2 inches, 
and deducting the width of three piers, 68 feet remains, which 
would give three arches of 22 feet 8 inches span each. 
It follows that the old water channel of the Nith in the 13th 
century measured 366 feet 6 inches across, between the abut- 
ments of the bridge; that the bridge, including its abutments, 
extended to at least 457 feet, and it was a 9-arched structure. 
The remains also show that provision had been made in the east 
abutment for a mill lade in connection with the old Sandbed 
Mill, which was bounded on the north by the bridge, and was 
not above the bridge, for the culvert is at too high a level to have 
been the tail race. 
On the motion of Dr Gilchrist, a vote of thanks was heartily 
awarded to Mr Barbour and also to Messrs M‘Dowall and Starke 
for the trouble which they had taken in connection with the 
Bridge and the Abbey. 
