RBGlass2
Romano-British Glass, Trace Elements
The concentrations for 11 trace elements in 105 Romano-British waste glass specimens from two furnace sites (Leicester and Mancetter).
- Keywords
- datasets
Usage
data("RBGlass2")
Details
The concentrations for 11 trace elements in 105 Romano-British waste glass specimens from two furnace sites (Leicester and Mancetter) come from Caroline Jackson's Ph. D. thesis at Bradford University. The data here were scanned from from Baxter (1994) Table A2. Measurements are parts per million (ppm) for each of 11 elements.
Format
A data frame with 105 observations on the following 12 variables.
Site
a factor with levels
Leicester
andMancetter
Ba
Barium ppm
Co
Cobalt ppm
Cr
Chromium ppm
Cu
Copper ppm
Li
Lithium ppm
Ni
Nickel ppm
Sr
Strontium ppm
V
Vanadium ppm
Y
Yttrium ppm
Zn
Zinc ppm
Zr
Zirconium ppm
References
Baxter, M. J., Cool H.E.M., Heyworth M.P. and Jackson, C.M. 1995. Compositional Variability in Colourless Roman Vessel Glass. Archaeometry 37(1), 129-141.
Baxter, M. J., Cool, H. E. M. and Jackson, C. M. (2005). Further Studies in the Compositional Variability of Colourless Romano-British Glass. Archaeometry 47, 47-68.
Jackson, C M, J R Hunter, S E Warren, and H E M Cool. 1991. The Analysis of Blue-Green Glass and Glassy Waste from Two Romano-British Glass Working Sites. In Archaeometry 1990, edited by E. Pernicka and G. A. Wagner, pp 295-304. Birkh<U+00E4>user Verlag.
Examples
# NOT RUN {
data(RBGlass2)
RBGlass2.pca <- prcomp(RBGlass2[, -1], scale.=TRUE)
biplot(RBGlass2.pca, xlabs=abbreviate(RBGlass2$Site, 1), cex=.75)
# }