Thought you might be interested in these FACTS which you are probably aware of but definitely not in this context..
1) Molecular MASS of Oxygen is 32 and 280 (height of G1) divided by 274 (height of G2) equals 1.02189715 which is precisely the 32 root of 2 !
2) Molecular MASS of Nitrogen is 28.02 or 1/10 of the height of G1 !
3) (My favourite !) Molecular mass of Carbon Dioxide is 44.01 or 1/10th of base of G1 !
4) Boiling point of Carbon Dioxide is minus 78.5 degrees Celsius and here is what Jim Allison writes:
... As the first perspective shows, the base of one side of the pyramid is shorter than the diameter of the circle. This is so because the diameter of the circle x 3.14 = it's circumference and because one side of the gp x 4 = it's perimeter, while the circumference and the perimeter are equal. The equation to calculate the percentage difference between the length of one of the base lengths and the circle's diameter is:
3.14/4 = .785 or 78.5%
Another way to do this calculation is to multiply the height of the gp x 2:
481.4 feet x 2 = 962.8 feet (diameter of the circle)
Base side length of the gp: 756 feet.
756/962.8 = .785 or 78.5%
The ratio between the part of the diameter of the circle that is equal to the base length of the gp, and the part of the diameter that is in excess of the base length is:
78.5/21.5 = 3.65