Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

Brief discussion of the history, design and physics of speaking tubes.
FINE HOMEBUILDING #9 Jun-Jul 1982 pg. 8

Old-house intercoms. Part 1. Buzzers, beepers, buttons, bells and speaking tubes. Includes diagram of wiring for old annunciators, a box with a bell and lights that indicate the room where the button was pressed.
OLD-HOUSE JOURNAL Oct 1979 (v.7#10) pg. 112

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