^8 Captain S. Brown on the Trinity Pier of Suspension. 
Eocplanation qf the Figures on the lower half of Plate /. 
Some of the principal component parts of Captain Brown’s 
Bridge of Suspension, copied from his specification enrolled in 
the Court of Chancery at Edinburgh, are represented in the 
lower part of Plate I. 
G is a straight bolt or bar, forming one of the joints of the main 
lines of suspension. 
H is a coupling-plate, to unite the bolts end to end. 
K is one of the bolts. 
I is a section of the bolt K. 
L is a hoop for tightening up the joint, and I a side view of it. 
MM is a side view of two bolts or bars united. 
NN is a vertical view of two pair of bolts, united as above. 
H is a suspending strap, and resting on the joints of two pair of 
joints, and supporting the lower bars of the bridge. 
SS is another method of forming the main suspender by straight 
bolts or bars, upset at the ends to fit and be bound in a pair 
of clam-joints, 
T shews the interior of the clam-joint. 
UU shews a pair of bolts united and hooped in by the clam- 
joint. 
V represents a third method of constructing’ the main suspender, 
by a combination of bars piled or laid laterally, and hesped 
tight over a joint formed by a jagged scarf. 
X is a section shewing sixteen bolts or bars piled and bound 
together, the suspending strap resting across them, and sup- 
porting the lower bar, as in R. 
Y is a side view of a plate, forming half of a long shackle, which 
may be used in removing any bolt or bar that may become 
defective. 
Z, Z, Z is a vertical view of the above, shewing the method of 
fixing the shackle and removing the bolt ee which is repre- 
sented as broken. 
