archdata (version 1.2)

RBGlass2: Romano-British Glass, Trace Elements

Description

The concentrations for 11 trace elements in 105 Romano-British waste glass specimens from two furnace sites (Leicester and Mancetter).

Usage

data("RBGlass2")

Format

A data frame with 105 observations on the following 12 variables.

Site

a factor with levels Leicester and Mancetter

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

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.

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)
# }