He not only agrees with Laplace and Lyell about the evolution of the solar system, but also supposes that the affinities, pointed out by Lothar Meyer and Mendeleeff, between groups of chemical elements prove an evolution of these elements from a primitive matter (prothyl) consisting of homogeneous atoms. These, however, are not ultimate enough for him; he thinks that everything, ponderable and imponderable or ether, is evolved from a primitive substance, which condenses first into centres of condensation (pyknatoms), and then into masses, which when they exceed the mean consistency become ponderables, and when they fall below it become imponderables.   anvd [Please select]

She was a fifth imponderable body, sharing all the other properties of the ponderable.   anvd [Please select]

We know that at 18,000 feet above the surface of the earth we have passed one-half the material, or, at all events, one-half the [v]ponderable body of air upon the globe.   anvd [Please select]

In ponderable matter it acts as if its density were increased without a proportionate increase of elasticity; and this accounts for the diminished velocity of light in refracting bodies.   anvd [Please select]