The four-gap bridge has large and heavy brass strip of mounted
on a teak wood base of size 44"x4". Heavy
nine nos brass terminals are provided to reduced the resistance to a minimum.
The ends gaps are closed by
removable brass bridging pieces which are held in position by the terminals. The 24 S.W.G.
Constantan wire
is stretched along the top of wooden meter scale and securely clamped to the brass end strips so that
end
errors are negligible. Supplied with superior quality spring type brass sliding jockey, which moves on metal
rod.