Assertion: boiler's water | /r/CapableOf | move by convection
Facets:
value: upwards
type: MANNER
Source sentences:
text: To hold these in place, a metal bracket was used, but to prevent these brackets from burning and eroding away they were built as water tubes, with cool water from the bottom of the boiler moving upwards by convection as it heated, and carrying the heat away before the metal reached its failure temperature.