And now the spectroscope
was turned upon the nebula, and many of them were found to be
gaseous. Here, then, was ground for the inference that in these
nebulous masses at different stages of condensation--some
apparently mere pitches of mist, some with luminous centres--we
have the process of development actually going on, and observations
like those of Lord Rosse and Arrest gave yet further confirmation
to this view. Then came the great contribution of the nineteenth
century to physics, aiding to explain important parts of the vast
process by the mechanical theory of heat.
Again the nebular hypothesis came forth stronger than ever, and
about 1850 the beautiful experiment of Plateau on the rotation of
a fluid globe came in apparently to illustrate if not to confirm
it. Even so determined a defender of orthodoxy as Mr. Gladstone at
last acknowledged some form of a nebular hypothesis as probably true.
Here, too, was exhibited that form of surrendering theological
views to science under the claim that science concurs with
theology, which we have seen in so many other fields; and, as
typical, an example may be given, which, however restricted in its
scope, throws light on the process by which such surrenders are
obtained.
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