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.

Electronic fog horn has a variable rate-per-minute and duration of "blow".
ELECTRONICS ILLUSTRATED Mar 1970 (v.13#2) pg. 59

Portable emergency light and foghorn combination uses 6-volt batteries.
MECHANIX ILLUSTRATED #457 Jun 1966 (v.62) pg. 92

A 2-mile boat horn.
POPULAR MECHANICS Aug 1963 (v.120#2) pg. 178

Boat horn uses siren module, small speaker and 4 batteries. Whole unit fits in a tin can with a wooden handle.
POPULAR MECHANICS Mar 1966 (v.125#3) pg. 156

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