Model Engineer Index 1898 to Feb 2025

Year 1925
Date 31-Dec
Volume 53
Issue 1,288
Page 839
Category Domestic Engineering
Part 2
Title Practical Private Telephone Installations at Low Cost
Author B.Clements Henry
Notes Installation Systems. Examples of parallel connections, central as "master station", central calling both ways, push with hook-switch for "one-way-call", two- and three- terminal receiving blocks, four-way push panel