M.J.Thomas 2 Wrote,

>Try as I may, I cannot see how Petrie arrived at 4402.1" for this total measure.
-------------------------------------------------------------------------------------------Petries mean base measure is 9068.8", so half base measure is 9068.8"/2 = 4534.4".

However in the general summary of positions, he uses a half base length of 4534" and 4534.1".
e.g. S. end of entrance passage is 4228" from N. 306" from Centre.
4228" + 306" = 4534"

He gives the position of the Q.chamber N.E.corner as 4402.1" from N.base, 102" from centre.

4534.1" - 102" = 4432.1"

The 0 should be 3.

When I first noticed this I contacted the Petrie museum who have a typed copy of the original manuscript. The error is also there.