Dataset: natron_glass_prod.csv

Source: M. Phelps, I.C. Freestone, Y. Gorin-Rosen, B. Gratuze (2016).
"Natron Glass Production and Supply in the Late Antique and Early
Medieval Near East: The Effect of the Byzantine-Islamic Transition,"
Journal of Archaeological Science, Vol. 75, pp. 57-71.

Description: Chemical elements for 128 specimens from 4 identified 
groups of specimens in the Middle East. Elements NA2O-FE2O3 are percents,
B2O3-PBO are parts per million.

Variable Names:
specimen
group 
Na2O3
MgO
Al2O3
SiO2
P2O5
K2O
CaO
TiO2
Fe2O3
B2O3
MnO
CoO
SrO
ZrO2
Sb2O3
BaO
PbO