Emission Spectroscopy

Abstract

THEprincipal advances in fundamental research and applications of atomic emission spectroscopy during six postwar years, 1946-51, were reviewed in three previous reports (87-89). The interest in those review's encouraged the preparation of this one covering the years 1952-53. As before, new' information is listed under standard wave lengths, spectral line intensities, Zeeman effect, term analysis, hyperfine structure, isotope shifts, spectrochemical analysis, and related topics.

The Population of the Amazon Basin in 1492: A View from the Ecuadorian Headwaters

“…However, Myers' (1988) suggestion that there may have been 10 million in one part of the upper Amazon alone would suggest a population perhaps eight times larger! The estimates worthy of fuller consideration here as the most recent and detailed, and exemplifying different approaches are, in increasing order of magnitude, those of Meggers (1954, 1971), Hemming (1978, Denevan (1970Denevan ( , 1976Denevan ( , 1992a and Myers (1988).…”

“…For many years, Meggers (1954Meggers ( , 1971 has argued that there were severe ecological constraints on subsistence patterns and populations in the Amazon region. Recently, she has attempted to substantiate this view by presenting the results of more than a decade's archeological reconnaissance of the principal tributaries of the Amazon.…”