Skip to content
PPXLROASTERS
PXL Roasters
  • History
    • Plate VI · section 19 of 19

    Archive plates

    Engravings and photographs from William Ukers's All About Coffee (1922), which has entered the public domain.

    Ukers 1922 plate, Kouilou coffee tree
    Kouilou (Coffea canephora) in Africa, plate from William Ukers, All About Coffee, 1922. Archive, public domain.
    One-year-old robusta estate, west coast of Sumatra
    One-year-old robusta estate, west coast of SumatraWilliam H. Ukers, All About Coffee, 1922 · Public domain
    Previous sectionWhat changed, 2023-2026Next plateRoasting
    In this plateThe 19 sections
    1. 01A species, not a variety
    2. 02Discovery and naming, 1880-1900
    3. 03Java, 1900-1919: rust paves the way for canephora
    4. 04The genome: diploid, allogamous, parent of arabica
    5. 05Two groups, then eight: genetic geography
    6. 06Selecting an allogamous plant: five strategies in a century
    7. 07Kouilou, Niaouli, Conilon: the Guinean and Atlantic lineage
    8. 08Uganda: the species on its native ground
    9. 09Coffee wilt disease, 1927-1993
    10. 10Agronomy: what the species requires
    11. 11Propagating, irrigating, cutting back: the grower's options
    12. 12Harvest and processing: Kiboko and washed
    13. 13A century of market share
    14. 14Vietnam since 1990
    15. 15Fine robustas and the CQI protocol
    16. 16Price: the 2024-2025 record
    17. 17The Timor Hybrid: what canephora gives arabica
    18. 18What changed, 2023-2026
    19. 19Archive plates

    The table of contents, with the first sentence of each section

    © 2026 Marco De Sousa Rosa · PXL RoastersTexts under CC BY-NC-SA 4.0 · tools: all rights reserved · images: see the provenanceHome · Colophon · Site map