On Fri, 12 Aug 2005 21:11:59 +1000 (EST), Steve wrote:

> Question Bill do you know if this relates to

> water tank cars or was it to do with steam trams??


The Working Order instruction applied to water sprinkler operations.

By 1937 it was probably a largely redundant instruction, that was
simply carried forward from earlier editions. It would have applied
equally to electric and steam sprinklers.

Cheers,

Bill

Bill Bolton
Sydney, Australia