History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t4.82

v1.c13.s2.t4.82

| Sl No. | Location of furnace | Shape | Cross section | | Heigh t cm | No. of bellow | Capa- city kg | Remarks |
| | | | Max cm. | Mouth cm. | bellow | | | | |
| 1. | Madhya Pradesh | Circular | O.D.107 I.D. 43 | O.D.56 I.D. 12 | 137 | two | 16 | Made above ground level |
| 2. | Madhya Pradesh | Rectangular | 122 × 76 | - | 122 | four | 214 | Two furnaces made into a pit of 122 × 305 × 91 cm smelted 380 kg of ore in 3 hrs.made from clay bricks |
| 3. | Nagpur | Square | 56 × 56 | 51 ö 25 | 92 to 122 | two | 5 | - |
| 4. | Rajdoha | Circular | O.D.107 I.D. 46 | O.D. 56 I.D. 13 | 132 | two | 18 | One heat took 6 hrs. and consumed 80 kg of charcoal |
| 5. | Nalanda Valley | Rectangular | 56 × 81 | 51 × 25 | 90 to 122 | two | 5 | Charge consisted of 25 kg ore, 25 kg charcoal |
| 6. | Salem | Circular | 61 | 31 | 90 to 153 | two | - | A chimney was fitted over the mouth as shown in Fig. |
| 7. | Mandla | Circular | O.D. 78 | O.D. 16 | 76 | - | - | - |
| 8. | Chiglabec ha (Koraput) | Circular | I.D. 30 | I.D. 15 | 95 | two | - | Hearth of furnace below ground level |
| 9. | Jiragora (Koraput) | Circular | I.D. 25 | I.D. 7.5 | 57.5 | two | - | Below ground level |
| 10. | Kamarjod a (Joda, Bihar) | Circular | I.D. 30 | I.D. 7.5 | 67.5 | two | - | Above ground level |