A verified source Excerpt and Ready Chicago Notes and Bibliography citation are linked.
In the comparison summarized by Miller, direct heating produced significant furfural formation under conditions where indirect steam heating did not. Heat-source effects depend on the charge and operating conditions.
September 28, 2026: fresh complete Miller source review and enlarged figure inspection; linked Miller excerpt and citation checked and qualifications repaired. This does not independently verify the underlying primary experiment or other linked works.
Final sensory effects depend on still design, charge, solids, operating practice, copper contact, and cut decisions. This is a secondary account of a particular comparison (PDF185–187; printed176–178), not a universal direct-fire versus steam rule.
Localized heating can promote thermal reactions. Furfural formation from pentoses does not by itself establish a Maillard pathway, and this comparison does not show that steam heating universally prevents thermal chemistry.
Supported by one locator-verified secondary synthesis. Preserve the stated qualifications and seek independent corroboration before using a source-specific quantitative result as a universal rule.
Claim record created from a complete source review.
Claim
In the comparison summarized by Miller, direct heating produced significant furfural formation under conditions where indirect steam heating did not. Heat-source effects depend on the charge and operating conditions.
Reasoning
Localized heating can promote thermal reactions. Furfural formation from pentoses does not by itself establish a Maillard pathway, and this comparison does not show that steam heating universally prevents thermal chemistry.
Qualification
Final sensory effects depend on still design, charge, solids, operating practice, copper contact, and cut decisions. This is a secondary account of a particular comparison (PDF185–187; printed176–178), not a universal direct-fire versus steam rule.