The material contrast is visually verified. The transition's timing and causal explanation should be bounded as caption interpretation.
Related visual evidence appears at Atherton on PDF sheet 247 and metal-clad warehouse siding at Dowling on sheet 190.
The J. E. Pepper powerhouse plate shows multi-story metal catwalks and ladders around boilers; the caption contrasts them with earlier wooden walkways and identifies fire resistance as a reason for the shift.
PDF screen 178
PDF screen 177
Photographs — J. E. Pepper catwalks
2026-09-29: main text/captions read across 274 screens; all pages visually surveyed and 22 enlarged details inspected. This record is bounded to its cited observation or source assertion, not independent historical/engineering corroboration. Whole-source full review remains open for embedded fine print. Photograph/caption coverage uses PDF screens 177–178, not printed pagination.
Verified visual evidence from the complete review of Carol Peachee's The Birth of Bourbon.
Evidence
The J. E. Pepper powerhouse plate shows multi-story metal catwalks and ladders around boilers; the caption contrasts them with earlier wooden walkways and identifies fire resistance as a reason for the shift.
Locator
- PDF: PDF sheet 178
- Section: Photographs — J. E. Pepper catwalks
- Evidence type: Image or Figure
Context
Related visual evidence appears at Atherton on PDF sheet 247 and metal-clad warehouse siding at Dowling on sheet 190.
Analytical use and caution
The material contrast is visually verified. The transition's timing and causal explanation should be bounded as caption interpretation.
Verification
Complete 274-sheet page-by-page textual and visual review completed 2026-08-26; image-caption pairing inspected in numbered contact sheets and locator checked against extracted text.