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From: gwyn%brl-vld@sri-unix.UUCP
Newsgroups: net.physics
Subject: speed of light
Message-ID: <13555@sri-arpa.UUCP>
Date: Thu, 17-Nov-83 02:25:49 EST
Article-I.D.: sri-arpa.13555
Posted: Thu Nov 17 02:25:49 1983
Date-Received: Sun, 13-Nov-83 19:41:51 EST
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From:      Doug Gwyn (VLD/VMB) <gwyn@brl-vld>

I took the couple dozen independent determinations of the speed of
light posted to this list not long ago, and computed their weighted
average:	2.9979291 _+ 0.0000014
Note that this is more accurate than the most accurate determination
listed.

Upon checking this "best estimate" for c against the individual
experiments, I find that there is more scatter than one would expect
on the assumptions:
(1) The "true" speed of light is the same in each experiment.
(2) Each measurement is independent of the others.
(3) The standard deviations properly represent random error.

However, there is no evidence of a monotone change in c with time.