34.380 feet = 20 cubits.
17.190 " = 10 cubits.
12
-------
206.280 inches = 10 cubits,
and 20.628 " = 1 cubit of Memphis;
and Newton himself says, at p. 360, vol. ii. _Life at the Pyramids_,--
"The cubit of Memphis of 1.719 English feet,"
12
------
or 20.628 inches,
and, therefore, there can be no possible doubt but that this is Newton's
determination of the length of the cubit of Memphis.
But Newton goes on to say in the same page, the cubit "double the length
of 12-3/8 English inches (=24.75 inches) will be to the cubit of Memphis
as 6 to 5."
Therefore, if we add 1/5 to 20.628 inches,
4.126
------
we have 24.754
as Newton's determination of the length of the Sacred Cubit.