   THE NORTH SIDE The calculations were so organized as to obtain the roural figure of 439 2/7 cubits for the north side. In order to achieve this result the east side was not only rotated at the middle by 0° 03 00”, but also was pushed back by a very small angle hinging on the southeast corner. This angle is 0° 00 00.70”. This means that the obtuseness of the northeast angle is 0° 30 00.88”. It could be that the builders ignored all angular differences of less than a second (which is very likely) or that there was some scientific mathematical reason for makes the east side inclined slightly more than 0° 30 00”. I will discuss this problem later is relation to the precession of the equinoxes. If I am correct in concluding that the inclination of the west side incorporated the rate of precession of the equinoxes and that it represents 3.6 years of precession, the yearly precession is 50’ 24”. The north side was divided by a line marked on the base stones in an eastern segment of 219 5/7 cubits and a western segments of 219 4/7 cubits. These segments were 115,087.9864 mm. and 115,162.8647 mm.; the Cole survey reports length of 115,161 and 115,090 mm., because it set the dividing point at the middle of the dividing line marked on the pyramid, whereas the western sector, which is the important one, must be counted from the edge of the marked line. The thickness of the marked line probably was calculated as 1/112 cubits = 4.6799 mm., so that the eastern segment, excluding the dividing line, comes to 115,158.1848. It would be in order to proceed to a new survey of the north side, because this figure may have a great significance. I have explained that the base of the pyramid indicated the length of the degree of latitude at the Equator, but at first one would expect the base of the Pyramid to indicate the degree of longitude at the Equator. Possibly this length was indicated by the eastern segment of the north. side. If we multiply this segment by 8, that is, we assume that the entire perimeter of the Pyramid conformed to the length of the eastern segment, and then we multiply this amount by 43,500 (348,000), we obtain an equatorial circle of 40,075,048.31 meters. The figure 43,500 would be a variation on 43,200 But in the matter of the meaning of the eastern segment of the north side, we must limit ourselves merely to suppositions, so long as no new survey corrects the obvious errors that occurred in the Cole survey.