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.
Describe fully the bells, wiring, indicators, battery, etc., in the Preamble, and state that the wiring is to include wood casings where requisite. Number the Bells, stating size and position; and how many points on each floor they are to ring, and indicate from, as, e.g.:-
2 1/2" bell in kitchen to ring and indicate from No. 3 points on ground floor and 4 points on first floor.
Number, and give p.c. value.
Number and describe, and give the length and quality of cord, and describe the hard-wood rosette; or give a p.c. value to include the whole.
Clause similar to those for "Gas-fitter" and "Bellhanger."