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Page 23. Table I – Shewing the work performed by the pumping engines reported in 1814.
| Engines | Months | Load per | Consumption | Number | Length of | Load in | Pounds lifted | Number |
| square inch | of coal in | of strokes | the stroke | pounds | one foot high | of strokes | ||
| on the piston | bushels | in the pumps | by consuming | per minute | ||||
| a bushel of coal | ||||||||
| 1814 | Feet Inches | |||||||
| Millanear | September | 4,9 | 1492 | 291440 | 6 - 0 | 16027 | 18,783815 | 5,6 |
| October | 5,0 | 1008 | 203660 | - | 16470 | 19,965953 | 5,0 | |
| November | 5,9 | 1006 | 184570 | - | 19683 | 21,667343 | 4,9 | |
| December | 6,1 | 2292 | 393000 | - | 19990 | 20,565628 | 7,4 | |
| 1815 | ||||||||
| January | 4,9 | 3062 | 562200 | - | 21151 | 23,300637 | 11,8 | |
| February | 6,9 | 2448 | 473520 | - | 22763 | 26,418470 | 13,1 | |
| March | - | 2651 | 525380 | - | - | 27,067176 | 12,8 | |
| April | - | 2862 | 547630 | - | - | 26,133546 | 13,6 | |
| May | - | 3492 | 574100 | - | - | 24,564357 | 11,8 | |
| ------ | ------------- | ------ | ||||||
| Total | 20313 | Average | 23,163002 | 10,63 |
Remarks -
Diameter of the cylinder, 58 inches; length of the stroke 7ft 6ins; working single – W.Sims, Engineer.
Drawing from 48 fathoms below the adit, and discharging therein the water of a 14 inch pump, 6 feet stroke = 40,08 gallons; average 426,17 gallons per minute.
Page 92. Table III – Shewing the work performed by the pumping engines reported in 1828.
| Engines | Months | Load per | Consumption | Number | Length of | Load in | Pounds lifted | Number |
| square inch | of coal in | of strokes | the stroke | pounds | one foot high | of strokes | ||
| on the piston | bushels | in the pumps | by consuming | per minute | ||||
| a bushel of coal | ||||||||
| Feet Inches | ||||||||
| Wheal Vor | January | 14,2 | 4624 | 296600 | 7-6 0 | 95307 | 45,850004 | 6,86 |
| (Trelawney's) | February | - | 4287 | 287630 | - | - | 47,958629 | 6,28 |
| March | - | 2987 | 215600 | - | - | 51,594047 | 6,2 | |
| April | - | 3750 | 291420 | - | - | 55,548731 | 5,9 | |
| May | - | 2473 | 207700 | - | - | 60,034160 | 5,0 | |
| June | - | 3329 | 268020 | - | - | 57,549223 | 5,8 | |
| July | - | 2970 | 250400 | - | - | 60,264830 | 6,18 | |
| August | 14,8 | 3000 | - | - | 99316 | - | - | |
| September | - | 3937 | 285710 | - | - | 54,055577 | 6,0 | |
| October | - | 3076 | 230250 | - | - | 55,756280 | 5,3 | |
| November | 14,96 | 3259 | 265400 | - | 100085 | 61,128932 | 5,75 | |
| December | - | 3330 | 247370 | - | - | 55,761320 | 5,18 | |
| Total | 41022 | Average | 55,045612 | 5,86 |
Remarks -
Diameter of the cylinder, 80 inches; length of the stroke 10ft; working single – Sims & Richards, Engineers.
Drawing from 192 fathoms below the adit, and discharging therein the water of a 15 inch pump, 7 feet 6 inches stroke = 57,52 gallons; average 337,06 gallons per minute.
Pearce’s 189,44
Western 230,79
Old 86,22
Total 843,51 gallons per minute from Wheal Vor
Page 131. Table IV – Shewing the work performed by the pumping engines reported in 1835.
| Engines | Months | Load per | Consumption | Number | Length of | Load in | Pounds lifted | Number |
| square inch | of coal in | of strokes | the stroke | pounds | one foot high | of strokes | ||
| on the piston | bushels | in the pumps | by consuming | per minute | ||||
| a bushel of coal | ||||||||
| Feet Inches | ||||||||
| Wheal Vor | January | 15,49 | 3275 | 269450 | 7-6 0 | 103802 | 64,052173 | 6,68 |
| (Trelawney's) | February | - | 3520 | 283590 | - | - | 62,721326 | 7,03 |
| March | - | 4770 | 350070 | - | - | 57,125166 | 6,94 | |
| April | 15,77 | 3774 | 283990 | - | 104355 | 58,894627 | 7,0 | |
| May | - | 4230 | 353370 | - | - | 64,382848 | 7,0 | |
| June | 15,8 | 3527 | 287080 | - | 104632 | 63,873875 | 7,12 | |
| July | - | 3371 | 275860 | - | - | 64,217851 | 6,84 | |
| August | 15,65 | 4411 | 340450 | - | 104909 | 60,728183 | 6,75 | |
| September | - | 3438 | 258120 | - | - | 59,073104 | 6,4 | |
| October | - | 3431 | 270060 | - | - | 61,931779 | 6,7 | |
| November | - | 4330 | 340020 | - | - | 61,786070 | 6,74 | |
| December | - | 3055 | 242870 | - | - | 62,551347 | 6,75 | |
| Total | 45132 | Average | 61,868195 | 6,83 |
Remarks -
Diameter of the cylinder, 80 inches; length of the stroke 10ft; working single – Richards, Engineer.
Drawing from 226 fathoms below the adit, and discharging therein the water of a 14 inch pump, 7 feet 6 inches stroke = 50,11 gallons; average 342,25 gallons per minute.
Page 137. Annual figures ( Millanear 1814/15)
Coal in bushels of 94 lbs = 20,313
Water discharged in Imperial gallons = 223,995,000
Water drawn 100 fathoms deep for one ton of coal = 93,000 Imperial gallons
Pounds lifted one foot high for one bushel of coal = 23, 163, 002