| CLOCK | ELAPSED | EVENT | AIR | CHARCOAL | ORE | |||
| COUNT | TOTAL | COUNT | AMOUNT | TOTAL | ||||
| kg | 500 gm | kg | kg | |||||
| 12:14 | start wood splints pre-heat | |||||||
| 12:23 | partial lid over furnace top | |||||||
| 13:45 | fill with wrist thick pieces | |||||||
| 13:53 | gentle | |||||||
| 13:55 | block tap arch with sod | |||||||
| 14:06 | first addition rough charcoal | 120 | 2.5 | 2.5 | ||||
| 14:11 | second amount rough charcoal | 2.5 | 5 | |||||
| 14:19 | fill to 30 cm above tuyere | 7.5 | 12.5 | |||||
| 14:31 | 2:17 | start main sequence | ||||||
| 14:31 | adjust air | 150 | ||||||
| 14:37 | 0:06 | burn to top of charcoal | 1 | 1 | ||||
| 14:49 | 0:12 | 1 | 2 | |||||
| 14:57 | 0:08 | 1 | 3 | |||||
| 15:07 | 0:10 | 175 | 1 | 4 | ||||
| 15:16 | 0:09 | 200 | 1 | 5 | ||||
| 15:25 | 0:09 | full | 1 | 6 | ||||
| 15:36 | 0:11 | 1 | 7 | |||||
| 15:37 | added as single slug | 2 | 1 | 1 | ||||
| 15:42 | added as single slug | 2 | 1 | 2 | ||||
| 15:46 | 0:10 | 1 | 8 | |||||
| 15:49 | 2 | 1 | 3 | |||||
| 15:52 | 2 | 1 | 4 | |||||
| 15:57 | 0:11 | 1 | 9 | |||||
| 16:00 | 2 | 1 | 5 | |||||
| 16:06 | 2 | 1 | 6 | |||||
| 16:09 | 0:12 | 1 | 10 | |||||
| 16:13 | 2 | 1 | 7 | |||||
| 16:16 | 2 | 1 | 8 | |||||
| 16:17 | 0:08 | 1 | 11 | |||||
| 16:26 | 4 | 2 | 10 | |||||
| 16:28 | 0:11 | 1 | 12 | |||||
| 16:30 | 2 | 1 | 11 | |||||
| 16:36 | 2 | 1 | 12 | |||||
| 16:39 | 0:11 | 1 | 13 | |||||
| 16:40 | 2 | 1 | 13 | |||||
| 16:49 | 0:10 | 1 | 14 | |||||
| 16:57 | 0:08 | start burn down | 1 | 15 | ||||
| 2:26 | TOTALS | 15 | 13 | |||||
| Main Slag mass | 7.5 | |||||||
| Slag fragments | 3.7 | |||||||
| SLAG PRODUCED | 11.2 | |||||||
| return | 86% |