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SCIENCE NEWS - 1604

We reprint a 1931 interview with Dr Sergius P. Grace of
Bell Telephone Laboratories in the USA, in which he
describes amazing devices to improve hearing, prevent
eavesdropping and photograph living cells without the
use of stains.
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Price:
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Manufacturer: NEXUS Magazine Pty Ltd
Description SCIENCE NEWS - 1604
We reprint a 1931 interview with Dr Sergius P. Grace of Bell Telephone Laboratories in the USA, in which he describes amazing devices to improve hearing, prevent eavesdropping and photograph living cells without the use of stains. Some of these technologies which have not seen the light of day have likely been classified as secret.

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