| CLOCK | ELAPSED | EVENT | AIR | CHARCOAL | ORE | ||||
| UNIT | COUNT | TOTAL | UNIT | TOTAL | |||||
| mark | P | bucket | kg | added kg | kg | ||||
| E=1.8 kg | |||||||||
| 12:00 | start wood splints pre-heat | ||||||||
| very gentle air (maintain burning) | |||||||||
| 12:41 | plug tap arch | ||||||||
| 12:50 | add rough charcoal | ‰ 2 | |||||||
| 12:55 | :55 | fill with graded charcoal | 800 | ‰ 1 | 3 | 5.40 | |||
| start main sequence | |||||||||
| 1:03 | :08 | added charcoal | 1 | 4 | 7.20 | ||||
| 1:14 | :11 | 1 | 5 | 9.00 | |||||
| 1:24 | :10 | 900 | 2 | 1 | 6 | 10.80 | |||
| 1:32 | heat zone to top | ||||||||
| 1:36 | :12 | 1 | 6 | 10.80 | |||||
| 1:43 | :07 | 1 | 7 | 12.60 | |||||
| 1:48 | :05 | 0.00 | |||||||
| 1:53 | first ore addition | ||||||||
| 1:54 | adjusted air | 850 | |||||||
| 2:04 | :16 | ore as 1 kg | 1 | 8 | 14.40 | 1 | 1 | ||
| 2:16 | 0:12 | 1 | 9 | 16.20 | 1 | 2 | |||
| 2:33 | :17 | 1 | 10 | 18.00 | 1 | 3 | |||
| 2:43 | :10 | 1 | 11 | 19.80 | 1 | 4 | |||
| 2:58 | :15 | 1 | 12 | 21.60 | 1 | 5 | |||
| 3:12 | :14 | increase ore charge | 1 | 13 | 23.40 | 1.5 | 6.5 | ||
| 3:33 | :21 | 1 | 14 | 25.20 | 1.5 | 8 | |||
| 3:35 | tuyere shoved into furnace | ||||||||
| air blast fails during repair | |||||||||
| 3:45 | convert to 2" pipe tuyere | 1400 | |||||||
| 3:53 | :20 | resume sequence | 1 | 16 | 28.80 | 1.5 | 9.5 | ||
| 4:01 | 0:08 | 1 | 17 | 30.60 | 1.5 | 11 | |||
| 4:10 | :09 | addition of DD2 analog | 1 | 18 | 32.40 | 1.5 | 12.5 | ||
| 4:19 | :09 | 1 | 19 | 34.20 | 1.5 | 14 | |||
| 4:27 | :08 | 1 | 20 | 36.00 | 1.5 | 15.5 | |||
| 4:41 | :14 | 1 | 21 | 37.80 | 1.5 | 17 | |||
| 4:52 | :11 | 1 | 16 | 28.80 | 2 | 19 | |||
| 5:05 | 0:13 | mix = 1.5 k DD2 + .5 k haematite | 1 | 17 | 30.60 | 2 | 21 | ||
| 5:17 | 0:12 | mix = 1 k haematite + 1 k rock | 1 | 18 | 32.40 | 2 | 23 | ||
| 5:28 | :11 | all rock ore | 1 | 19 | 34.20 | 2 | 25 | ||
| 5:39 | :11 | 1 | 20 | 36.00 | 2 | 27 | |||
| 5:49 | :10 | 1 | 21 | 37.80 | 2 | 29 | |||
| (end of record) | |||||||||
| time (total) | E 6:00 | ||||||||
| time (main sequence) | 5:45 | ||||||||
| total charcoal | E 45 kg | ||||||||
| total ore | 29 kg | ||||||||
| total high Fe ore | 10.4 kg | ||||||||
| bloom | 2.2 kg | ||||||||
| yield (against total) | 8% | ||||||||
| yield (corrected to high Fe ore) | 21% |