"Cross reference of HP PTM images of Antikythera Mechanism" Updated July 9 2007 Herb Johnson hjohnson@retrotechnology.com The Antikythera Mechanism fragments are visually identified by letter A-G and number 1-75, in an image and legend charts in "Supplementary Notes" ofthe Nature Letters paper (vol 444, 30 NOv 2006, "Decoding the ancient Greek....Antikythera Mechanism", doi:10.1038/nature05357). Those images were film photographed by Costas Xenikakis for the Antikythera Mechanism Research Project in 2005. Identification of Fragments A - D originate with Svoronos (1908). Fragments E, F, G and smaller fragments were identified by number and side by Maria Zafeiropoulou, Senior Archaeologist at the National Archaeological Museum in Athens in 2005. First publication of the additional fragments by number and side is in the Nature paper cited above. In the Nature article: for Figure 1 and its key, all fragments are imaged from side 1, except fragment F which is from side 2. (This side information was obtained from Freeth in correspondence with me during May 2006; I confirmed it later with images F-1.jpg and F-2.jpg from Freeth.) The list in this document is of PTM images obtained in September of 2005, as part of the Antikythera Research Project by HP researchers Bill Ambrisco, Dan Gelb and Tom Malzbender; and Professor Mike Edmunds of Cardiff University. They imaged the fragments at the National Archaeological Museum in Athens with reflectance imaging techniques to the front and rear surfaces of the many fragments that comprise the Mechanism. This work was also referenced in the Nature paper above and are also discussed at this HP Web page. I obtained the PTM image set from Malzbender in Feb 2007. However, the PTM image set did not include a cross reference to fragment name or side. I visually compared the PTM images to images in the Nature paper's "Supplementary Notes", and identified the PTM imaged fragments by matching shapes and contours. Where that paper described sides with textual descriptions, I identified some PTM images as side -1 or side -2. But I could not make a complete list by sides. In May 2007, Dr. Freeth sent me a set of fragment images scanned from the film images from 2005 above (Xenikakis) which included number and side descriptions (Zafeiropoulou), for both sides of (almost) all fragments. Using these images, which Tony calls the "AMRP images", I have updated my descriptions and they are listed below. Where there are conflicts or inconsistencies, I've added "notes" referencing all these various image sources. In July I made a set of JPEG images from the PTM image set, as a series of screen captures, for convenience. These images have the same file name as the PTM images but have a ".jpg" extension. With those images and the Freeth images, I completed my descriptions. - Herb Johnson The list below cross references the PTM images to fragments by name and side. Fragments are as identified in Freeth images and in the Nature article Figure 1 and its key. These PTM images are often paired by "a" and "b", where the "b's" are images of the "reverse" sides of fragments as imaged in the "a's". Otherwise, image pairs are explicitly identified as "reverse of". When a portion of a larger fragment is imaged, I attempt some description by orientation or feature or relation to another imaged portion. AK1a.ptm - * frag 19-1 AK1b.ptm - * frag 19-2 AK2a.ptm - * upper left, 24-2; lower left, 26-1; center, 21-2; lower right, 25-1. AK2b.ptm - * upper left, 26-2; upper right, 25-2; lower left, 24-1; lower right & center, 21-1. AK3a.ptm - * upper left, 30-2; lower left, (fragmt. near 19-1?). right, 22-1. AK3b.ptm - * upper left, 30-1; lower left, (fragmt. near 19-2?). right, 22-2. Note: There is a small fragment between #30 and #19 in the AMRP image set "19-1 to 30-1.jpg" and "19-2 to 30-2.jpg" which seems to correspond to the small unnamed fragment at the lower left of the PTM 3a and 3b images, as described here. AK4a.ptm - * left, 20-1; right, 23-1. AK4b.ptm - * left, 20-2; right, 23-2. AK5a.ptm - * left, 29-1; center, 27-2; right, 28-2. AK5b.ptm - * left, 27-1; center, 29-2; right, 28-1. AK6a.ptm - * frag G-1, text. AK6b.ptm - * frag G-2. AK7a.ptm - * frag E-1. AK7b.ptm - * frag E-2. AK8a.ptm - * frag D-1. AK8b.ptm - * frag D-2, some exposed gearteeth. AK9a.ptm - * frag F-2. Ak9b.ptm - * frag F-1. - note: Figure 1 and its key in Nature article show F-2 side, most other frags show -1 side. AK11a.ptm - * portion of frag G-1, small lobe w/text."opposite" of 12a. AK12a.ptm - * portion of frag G-1, tabbed edge "opposite" of 11a. AK13a.ptm - * portion of frag G-1, large lobe w/text. "opposite" of 14a. AK14a.ptm - * portion of frag G-1, rounded corner w/text. "opposite" of 13a. AK15a.ptm - * portion of frag G-1, edge and space "between" 13a and 11a. AK16a.ptm - * portion of frag G-1, edge "opposite" 15a. AK17a.ptm - * upper: left 41-1, ctr left 44-2, ctr rt 40 (text), right 42-2. lower: left 38-1, ctr left 39-1, ctr rt 43-1, right 37-2. AK17b.ptm - * upper: left 41-2, ctr left 44-1, ctr rt 40 (no text), right 42-1. lower: left 38-2, ctr left 39-2, ctr rt 43-2, right 37-1. NOte: in AMRP images "37-1 to 44-1.jpg" and "37-2 to 44-2.jpg", fragment #40 is imaged on the same side in BOTH images. So I've identified it by features, not numbered side. But among the fragments, the "1" sides seem to be lettered, the "2" sides are not.- Herb AK18a.ptm - * upper: left 8-2, ctr 16-2, right 12-2. lower ctr 9-2. AK18b.ptm - * upper: left 12-1, ctr 16-1, right 8-1. lower ctr 9-1. AK19a.ptm - * upper: left 11-2, ctr left 15-1, right 17-2. lower: left 10-2, ctr left 13-1, ctr rt 14-2, right 18-2. AK19b.ptm - * upper: left 17-1, ctr 15-2, right 11-1. lower: left 18-1, ctr left 14-1, ctr rt 13-2, right 10-1. AK20a.ptm - * frag 3-2 AK20b.ptm - * frag 3-1. AK21a.ptm - * frag C-2. reverse of 33a, 34a AK22a.ptm - * portion of frag C-2. right-angled corner AK23a.ptm - * portion of frag C-2. right-angled corner, similar to 22a. AK24a.ptm - * portion of frag C-2, "arm" to center. AK25a.ptm - * portion of frag C-2, small corner on circular depression, to center. AK26a.ptm - * portion of frag C-2, small corner on circular depression, to center. Similar to 25a. AK27a.ptm - * portion of frag C-1, corner with "trench". Similar to 28a. AK28a.ptm - * portion of frag C-1, corner with "trench". similar to 27a. AK29a.ptm - * portion of frag C-1, center near "scales". Similar to 30a. AK30a.ptm - * portion of frag C-1, center near "scales". similar to 29a. AK31a.ptm - * portion of frag C-1 - scale corner. similar to 32a AK32a.ptm - * portion of frag C-1 - scale corner, similar to 31a AK33a.ptm - * frag C-1. reverse of 21a. similar to 34a AK34a.ptm - * frag C-1, reverse of 21a., similar to 33a AK35a.ptm - * portion of frag B-1, center to one edge. Opposite "half" from 37a. AK36a.ptm - * portion of frag B-1, center to one edge. Similar to 35a. AK37a.ptm - * portion of frag B-1, center to one edge. Opposite "half" from 35a, 34a. AK38a.ptm - * portion of frag B-2, edge to near center. Opposite "half" from 39a. AK39a.ptm - * portion of frag B-2, edge to near center. Opposite "half" from 38a. AK40a.ptm - * portion of frag B-2, extended circular "hub" near edge AK41a.ptm - * frag B-2, radial ringed side AK42a.ptm - * frag B-1, inscripted side AK43a.ptm - * frag A-1, whole side imaged AK44a.ptm - * frag A-1, whole side imaged, similar to 43a AK45a.ptm - * frag A-2, whole side imaged AK46a.ptm - * frag A-2, whole side imaged, similar to 45a Ak47a.ptm - * portion of frag A-2, corner Ak48a.ptm - * portion of frag A-2, corner, similar to 47a. Ak49a.ptm - * portion of frag A-2, "above" corner of 47a & 48a. AK50a.ptm - * portion of frag A-2, "above" 49a along edge. AK51a.ptm - * portion of frag A-2, corner "opposite" from 47a & 48a. AK52a.ptm - * portion of frag A-2, "central". AK53a.ptm - * portion of frag A-2, corner "adjacent" from 47a & 48a. AK54a.ptm - * portion of frag A-1, "central" to gear AK55a.ptm - * portion of frag A-1, an edge AK56a.ptm - *? end of cylinder w/square hole, possibly end or edge view of fragment A? AK57a.ptm - * portion of frag A-1, between edge of 55a and center. AK58a.ptm - * frag 4-1. AK58b.ptm - * frag 4-2. AK59a.ptm - * upper left 5-1, center 7-2, right 6-1; lower left 2-1, right 3-2. AK59b.ptm - * upper left 5-2, center 7-1, right 6-2; lower left 2-2, right 3-1. Ak60a.ptm - * frag 1-2, "flat" side AK60b.ptm - * frag 1-1, "notflat" side. AK61a.ptm - * frags 45-1 to 75-1 in labled array. Numbered by row from right to left, lower row to upper. All are -1 sides except 55-2, 56-2, 61-2, 67-2, 70-2, 72-2. See note for #65, which I believe is 65-2. AK61b.ptm - * rags 45-2 to 75-2 in labled array. Numbered by row from right to left, lower row to upper. All are -2 sides except 55-1, 56-1, 61-1, 67-1, 70-1, 72-1. See note for #65, which I believe is 65-1. Each fragment reversed in place from 61a. Note: in AMRP images "45-1 to 75-1.jpg" and "45-2 to 75-2.jpg", fragment 65 is labeled "65-2" in both, but the images appear to be of either side. In the Nature article, "chart 2" shows what appears to be the shadow of fragment 65 in "45-1 to 75-1.jpg", among the other 1-sides imaged. THerefore I'd guess that the "65-2" identification in "45-1 to 75-1.jpg" should be "65-1". AK62a.ptm - * upper, 67-1; lower, from left to right: 33-1, 34-2, 35-2, 36-1. AK62b.ptm - * upper, 67-2; lower, from left to right: 33-2, 34-1, 35-1, 36-2. AK63a.ptm - * left 32-1, right 31-1. AK63b.ptm - * left 32-2, right 31-2.