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Earth, Planets and Space
Figure 1 | Earth, Planets and Space

Figure 1

From: Archeointensity study on baked clay samples taken from the reconstructed ancient kiln: implication for validity of the Tsunakawa-Shaw paleointensity method

Figure 1

A series of the photographs taken during the reconstruction experiment by Nakajima et al. (1974). (a) Local trees and weeds were trimmed to reconstruct a Noborigama kiln. (b) Ground was dug up. (c) In situ geomagnetic field was measured by a Schmidt-type magnetometer. (d) Thermocouples were embedded in and around the kiln to record in situ temperature variations during firing. (e) White circles indicate example locations of the thermocouple contacts. (f) A body of the kiln was made up with bamboos and tree branches, which were subsequently covered and coated with clay. (g) Sue-type earthenwares to be fired. (h) Firing was done using naturally grown pine trees and other miscellaneous woods taken around the kiln. The bamboos and tree branches were gutted by fire, and baked clay remained as the kiln body. (i) Inside view of the kiln after firing. (j) Cross-section of the fire hole after firing. (k, l) Baked clay was carefully sampled from the floor surface (k) and the −20-cm level (l) using plaster with orientation.

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