Thus we have obtained a perfect set of natural and convenient measures which fits the plan, and fits the circumference of the earth.
And I claim for the R.B. cubit that it is the most perfect ancient measure yet discovered, being the measure of the plan of the Pyramids of Gïzeh.
The same forgotten wisdom which divided the circle into three hundred and sixty degrees, the degree into sixty minutes, and the minute into sixty seconds, subdivided those seconds, for earth measurements, into the sixty parts represented by sixty R.B. cubits.
We are aware that thirds and fourths were used in ancient astronomical calculations.
The reader will now observe that the cubit measures of the main Pythagorean triangle of the plan are obtained by multiplying the original 3, 4 and 5 by 360; and that the entire dimensions are obtained in R.B. cubits by multiplying the last column of connected natural numbers in the table by eight,—thus—
| R. B. CUBITS. | ||
| DC | 3 × 360 = | 1080 |
| CA | 4 × 360 = | 1440 |
| DA | 5 × 360 = | 1800 |
or,
| NATURAL NUMBERS. | R. B. CUBITS. | |
| DC | 135 × 8 = | 1080 |
| CA | 80 × 8 = | 1440 |
| DA | 225 × 8 = | 1800 |
&c., &c.
(See Figure 5, p. 18.)