Andy Breen wrote:
I'm getting more and more sure there's some subtlety in the way these early
machines were operated that I'm missing - some lost art of working those
boilers...

'Twas ever so. New tchnology comes along, and the old ways get lost.

How many people can properly set the mixture on a gas lamp nowadays just
by looking and listening?

--
Tciao for Now!

John.