This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol2", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
The Preamble should contain a description of the bells, and their average weight, the kind, quality, and gauge of wire, if in concealed tubes, and whether the tubes are of zinc or copper. Describe also the springs and cranks.
Number these, including wiring complete, and state the number of points they are to ring from.
Number, and state p.c. value.
Number and describe, and state for how many bells, and if indexed.
Clause similar to that for "Gasfitter."