10. Applying the idea of centrifugal force to the earth considered as a rotating body, he perceived that it could not be a true sphere, and calculated its oblateness, obtaining 28 miles greater equatorial than polar diameter.
"Pioneers of Science"
Oliver Lodge
Suppose, now, that in place of an orange, which is a spheroid of very slight oblateness, we take a spheroid of very great oblateness, shaped somewhat like a lens of small convexity.
"Essays: Scientific, Political, & Speculative, Vol. I"
Herbert Spencer
That is to say, according to the oblateness of a rotating spheroid, the detached ring may be either a hoop-shaped ring or a quoit-shaped ring.
"Essays: Scientific, Political, & Speculative, Vol. I"
Herbert Spencer