historical perspectives: from the hasmoneans to bar kokhba in light ...
historical perspectives: from the hasmoneans to bar kokhba in light ...
historical perspectives: from the hasmoneans to bar kokhba in light ...
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182 JAN GUNNEWEG AND MARTA BALLA<br />
composition by us<strong>in</strong>g multivariate statistics. Characteristic statistical<br />
values (mean vec<strong>to</strong>r and covariance matrix) of <strong>the</strong> group or groups<br />
are def<strong>in</strong>ed as well as <strong>the</strong> chemical outliers. A group or groups tested<br />
on a given confidence level can be used <strong>from</strong> now on for fur<strong>the</strong>r<br />
comparisons. To determ<strong>in</strong>e <strong>the</strong> relation of any pottery piece with<br />
this group, one has <strong>to</strong> establish <strong>the</strong> statistical match of <strong>the</strong> chemical<br />
composition of <strong>the</strong> artifact <strong>in</strong> question with that of <strong>the</strong> reference<br />
group. We have devised certa<strong>in</strong> criteria for decid<strong>in</strong>g whe<strong>the</strong>r <strong>the</strong> test<br />
piece is part of <strong>the</strong> group.<br />
Modus operandi<br />
N<strong>in</strong>ety-one samples of reference materials and vessels were taken<br />
<strong>from</strong> Qumran f<strong>in</strong>ds <strong>to</strong> establish a local chemical profile and a search<br />
for a statistical match of <strong>the</strong> vessels <strong>to</strong> this profile respectively. Pottery<br />
powder obta<strong>in</strong>ed by a sapphire drill was placed <strong>in</strong><strong>to</strong> a plastic cup<br />
and registered. The powder was <strong>the</strong>n weighed and sealed <strong>in</strong> a polyethylene<br />
vial. These vials were irradiated <strong>in</strong> <strong>the</strong> nuclear reac<strong>to</strong>r of<br />
<strong>the</strong> Technical University of Budapest with a neutron flux of 2.4 X<br />
10. 12 A Canberra HPGe Well-type Detec<strong>to</strong>r, connected <strong>to</strong> a Canberra<br />
SI00 Multichannel Analyzer, performed <strong>the</strong> Gamma-spectrometric<br />
measurements. For <strong>the</strong> evaluation of spectra, SAMPO 90 software<br />
was used. Standardization was made by <strong>the</strong> so-called s<strong>in</strong>gle compara<strong>to</strong>r<br />
method, us<strong>in</strong>g gold as <strong>the</strong> compara<strong>to</strong>r element. The accuracy<br />
of <strong>the</strong> measurements was controlled by measur<strong>in</strong>g <strong>the</strong> NBS<br />
1633a Coal Fly Ash Standard Reference material.<br />
An Interest<strong>in</strong>g F<strong>in</strong>d<br />
If we f<strong>in</strong>d that <strong>the</strong>re is a corroboration between what has been<br />
learned <strong>from</strong> <strong>the</strong> pottery vis-a-vis <strong>the</strong> epigraphy and palaeography<br />
of <strong>the</strong> scrolls <strong>the</strong>mselves, our goal is achieved. One may be able <strong>to</strong><br />
prove that <strong>in</strong>dependent <strong>in</strong>formation provid<strong>in</strong>g <strong>the</strong> same conclusions<br />
can be reached through different discipl<strong>in</strong>es. However, before reach<strong>in</strong>g<br />
that conclusion we first have <strong>to</strong> sample systematically as many<br />
pieces of pottery as possible, <strong>from</strong> as many caves. Only this may<br />
provide <strong>the</strong> necessary data needed for sound conclusions.<br />
Among <strong>the</strong> scrolls discovered at Qumran is a m<strong>in</strong>or assembly of<br />
Greek papyrus fragments found <strong>to</strong>ge<strong>the</strong>r <strong>in</strong> Cave 7. This cave con-