mm′
nn′ = (πD)/(πd),
or otherwise
mm′ = 3.1416 D,
and
nn′ = 3.1416 d.
We have also,
mm′
nn′ = mo
no.
Expressing the radius of curvature by r, and the half gauge by e, the above proportion may be expressed by
mm′
nn′ = r + e
r – e,
and also
mm′
nn′ = (πD)/(πd),
or otherwise
mm′ = 3.1416 D,
and
nn′ = 3.1416 d.
We have also,
mm′
nn′ = mo
no.
Expressing the radius of curvature by r, and the half gauge by e, the above proportion may be expressed by
mm′
nn′ = r + e
r – e,
and also