HERON’S ARTILLERY CONSTRUCTION CHAPTERS 9 AND 10

| English Translation (from Greek) |

| English Translation (from German) |
| :--- | :---: | :--- |
| p. 85 1 ...having brought the ends of the pulley system original: "polyspaston" 2 back to the axle, they 3 turned it. And in this way, it happened 4 that the drawing back became 5 easier, but slower, because the 6 lines original: "kola", literally "limbs" or "segments" of the rope of the pulley system being 7 more numerous, the winding was 8 performed in a single place, and for this 9 reason, the process was delayed. | The winch original: "Haspel" was secured and the pulled ends were connected to the shaft, which was then turned. This naturally made the tensioning easier, but at the same time slower, because in a pulley system the rope runs in several passes, but is wound up at only one point and therefore moves slowly. |
| 10 The pulley system can also 11 be arranged differently, when the 12 pulleys in one of its blocks original: "mangano" 13 are placed in the claw-housing original: "chelonio", and those 14 in the other block are placed in the pipe original: "syringi" near 15 the lower part by the axle. | One can also attach the pulley system differently, if the rollers of one tackle block original: "Kloben" are attached to the trigger-mechanism, while those of the other are at the rear end of the pipe near the shaft. |
| 11 16 So that the slider original: "diostra" 17 may not be difficult to move forward on the larger 18 engines, but rather that it may be 19 brought forward by the axle being turned in the opposite 20 direction, it will be done as follows: if we 21 insert a transverse axle beneath the male dovetail original: "arreni pelekino", a wedge-shaped joint used to guide the slider 22 at the lower part of the slider 23 itself, then attach 24 two ropes original: "hopla", literally "tools" or "rigging" to the axle; 25 bringing the other ends of these 26 to the upper part of the pipe through 27 certain pulleys fixed at 28 its very tip, and bringing them down again, 29 let us attach them once more to the axle, 30 so that when it is turned in the opposite direction... | To ensure the slider is not difficult to push forward on larger artillery pieces, but is instead brought forward by the reverse rotation of the shaft, this can be achieved by placing a shaft under the dovetail-shaped feather original: "schwalbenschwanzförmigen Feder" at the rear end of the slider. Then, two ropes are attached to this shaft, which pass over the front end¹ of the pipe via rollers attached to its tip, returning back to the shaft where they are fastened. If the tensioning shaft is... |

1 Agomenas [brought] M P V: Legomenas [called] R. Schn. | 5 De [but] missing in M | Dia to ta tou [because of the...] PV: Dia te tou M
12 Eni [one] PV: missing in M | 16 Me dyscheros [not difficultly] Baldus: Me dia cheiros [not by hand] M P V | 17 Organon [engines] missing in P
20 Outos [thus] V | 21 Tes [the] M V P^b: missing in P^a | 23 Eita [then] Thévenot: Eis ta [into the] M P V | 24 Exaptomen [let us attach] Thévenot: Exaptomen [we attach] M P V: Exapsomen [we shall attach] R. Schn. | 29 Exapsomen [let us attach] M P V

¹ Necessary only up to this point for the euthytonon a "straight-spring" catapult designed for shooting bolts.