The Heath siren from the Ferry Building was restored and placed in the San Francisco Maritime Museum. It was not like the Pleasanton siren, but a huge thing that resembled an 8-foot long Sterling Model M. It could supposedly attain full volume instantly, and could be heard five miles across the bay in Oakland.
http://www.sfgate.com/news/article/Blas ... 851707.php
http://www.sfgate.com/news/article/Ferr ... 876224.php
There was a second one like this built that Heath sent to London to warn of Zeppelin attacks in WWI. I wonder if that siren is still in existence.
Lex orandi, lex credendi, lex vivendi.