| Clue | Source | Date |
|---|---|---|
| Calcium oxide furnace | The Telegraph Cross Atlantic | 11 Sep 2025 |
| Furnace or mill Ken and I rebuilt (8) | ||
| Furnace for calcination (8) | ||
| Furnace for calcium oxide production | New York Times | 16 Jan 2022 |
| Fruit cocktail with the Italian Negroni on top of oven | Irish Times Crosaire | 11 Dec 2020 |
| Industrial heater for citrus fruit needing link to cook | The Telegraph Cryptic | 02 May 2015 |
| Workmanlike milkman holds up baker | ||
| Hot spot for shells | ||
| Oyster shells are reduced here | ||
| Oyster shell blast spot |