Thus he establishes the principle of utility.
He establishes an identity—J.
This fact, coupled with the determination of the vapour density of the gas, establishes the molecular formula CO.
This survey of the phenomena of extinction in one great class of animals certainly establishes the existence of an almost infinite variety of causes, some of which are internal, some external in origin, operating on animals of different kinds.
The other method starts from the observed values of the periods, and establishes a differential equation from which these periods may be derived.
