If water were used, the thermometer would be limited to mild temperature conditions because either freezing or boiling would break the thermometer.
(water; were used; ) (the thermometer; would be limited; to mild temperature conditions; because either freezing or boiling would break the thermometer) (either freezing or boiling; would break; the thermometer)
water the thermometer either freezing or boiling
were used would be limited would break
to mild temperature conditions because either freezing or boiling would break the thermometer
the thermometer