Recent Archaeomagnetic Results in England
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Since 1959 we have been engaged in a continuous programme of collecting orientaed samples from archaeological kilns, ovens , and hearths, mainly in the southern half of Britain. Our collection technique follows that established by Professor Thellier and we acknowledge a great debt of gratitude to him for his help and encouragement . The sample size was usually 4 inches by 4 inches enclosed in a 5 inch cube of plaster; these were measured on a large 5 cps spinner magnetometer again following the principles established by Professor Thellier. We report here the results obtained form some 80 archaeological structures; at least 12 samples were taken from each structure and often as many as 20. Allowance for viscous components was made either by storage techniques or by thermal washing at 100°C; the correction involved rarely exceeded a few degrees. The average direction for each structure was calculated using Fisher statistics and also the circle of confidence at the 80% level. With one exception the structures were located with 200 miles of London; the values for the angle of inclination (I) have been reduced to the latitude of London (51.oN) on the assumption