I would like to see a discussion of this on the list, as we are thinking of
trying this in our First World War trench when we rebuild it and introduce
hydraulics to make it shake, etc., when the shells are heard to explode.

The Canadian Museum of Civilization tried a very small container of fish oil,
heated over a light bulb once, to try to add some smell to their Basque
tryworks. I wasn't there at the time but I am told that it went all over the
building which reeked for several days. The message seems to be that, if you're
going to use smell, do it outside, where any unwanted odour dissipates quickly,
or, if you use it inside, contain it within an envelope of some kind and vent
it to the outside.

Harry Needham
Canadian War Museum