History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c17.s3.t4.10
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c17.s3.t4.10
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v1.c17.s3.t4.10
The drill holes were studied with a technique known as functional analysis, in which an impression of the hole was made using a silicone material. This model in effect turned the hole inside out. The impression was then coated with conductive gold and examined in an Amray 1000 Scanning Electron Microscope, and observations recorded on Polaroid film.