Identifying arthropods using a dichotomous naming key

Furthermore, the Etherington's distance-duality equation is a consequence of the dichotomous cosmology.

Furthermore, the Etherington's distance-duality equation is a consequence of the dichotomous cosmology.

When the moon appears dichotomized its distance from the sun is less than a quarter of the circumference [of its orbit] by a thirtieth part of that quarter.

When the moon appears to us dichotomized it offers to our view a great circle [or actual meridian] of its circumference which divides the illuminated part from the dark part.